Instruction/ maintenance manual of the product DS21Q55 Maxim
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Product Preview DS21Q55 Note : This Product Preview contains preliminary information and is subject to change without notice. Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels.
Product Preview DS21Q55 2 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 1. DESCRIPTION The DS21Q55 is a quad MCM devices featuring independent transceivers that can be software configured for T1, E1, or J1 operation.
Product Preview DS21Q55 3 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . The device fully meets all of the latest E1 and T1 specifications, inclu ding the following: § ANSI: T1.
Product Preview DS21Q55 4 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 1.1 FEATURE HIGHLIGHTS The DS21Q55 contains all of the features of the previous generation of Dallas Semiconductor’s T1 and E1 transceivers plus many new features.
Product Preview DS21Q55 5 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . § Requires only a 2.
Product Preview DS21Q55 6 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . § Hardware - signaling capability − Receive - signa.
Product Preview DS21Q55 7 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Note: This data sheet assumes a particular nomenclature of the T1 and E1 operating environment. In each 125 µ s T1 frame, there are 24 8 - bit channels plus a framing bit.
Product Preview DS21Q55 8 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TABLE OF CONTENTS 1.1 FEATURE HIGHLIGHTS ................................................................
Product Preview DS21Q55 9 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 12. LOOPBACK CONFIGURATI ON .............................................................................
Product Preview DS21Q55 10 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.3.4 Receive Packet Bytes Available ..................................................................
Product Preview DS21Q55 11 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 32.2 E1 M ODE ..........................................................................................
Product Preview DS21Q55 12 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 1.2 DOCUMENT REVISION HISTORY 1) Initial Preliminary .
Product Preview DS21Q55 13 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 2. BLOCK DIAGRAM A simplified block diagram showing the major components of the DS21Q55 is shown in Figure 4 - 1.
Product Preview DS21Q55 14 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 3. PIN FUNCTION DESCRIPTION 3.1 Transmit Side Pins Signal Name: TCLK x Signal Description: Transmit Clock Signal Type: Input A 1.
Product Preview DS21Q55 15 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: TSYNC x Sign al Description: Transmit Sync Signal Type: Input/Output A pulse at this pin will establish either frame or multiframe boundaries for the transmit side.
Product Preview DS21Q55 16 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: TNEGI x Signal Description: Transmit Negative Data I nput Signal Type: Input Sampled on the falling edge of TCLKI for data to be transmitted out onto the T1 line.
Product Preview DS21Q55 17 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: RSYNC x Signal Description: Receive Sync Signal Type: Input/Output An extracted pulse, one RCLK wide, is output at this pin which identifies either frame (IOCR1 .
Product Preview DS21Q55 18 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: BPCLK x Signal Description: Back Plane Clock Signal Type: Outpu t A user - selectable synthesized clock output that is referenced to the clock that is output at the RCLK pin.
Product Preview DS21Q55 19 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: MUX Signal Description: Bus Operation Signal Type: Input Set low to select nonmultiplexed bus operation.
Product Preview DS21Q55 20 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Si gnal Name: A7/ALE (AS ) Signal Description: A7 or Address Latch Enable(Address Strobe) Signal Type: Input In nonmultiplexed bus operation (MUX = 0), it serves as the upper address bit.
Product Preview DS21Q55 21 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: JTCLK Signa l Description: IEEE 1149.1 Test Clock Signal Signal Type: Input This signal is used to shift data into JTDI on the rising edge and out of JTDO on the falling edge.
Product Preview DS21Q55 22 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Signal Name: TTIP x and TRING x Si gnal Description: Transmit Tip and Ring Signal Type: Output Analog line driver outputs.
Product Preview DS21Q55 23 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 3.8 Pinout DS21Q55 PIN DESCRIPTION Table 5 - 1 NOTE: Signal is common to all transceivers unless otherwise stated PIN SYMBOL TYPE DESCRIPTION U3 A0 I Address Bus Bit 0 (lsb).
Product Preview DS21Q55 24 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PIN SYMBOL TYPE DESCRIPTION A20 DVSS2 – Digital Signal Ground. B11 DVSS2 – Digital Signal Ground. A5 DVSS3 – Digital Signal Ground.
Product Preview DS21Q55 25 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PIN SYMBOL TYPE DESCRIPTION #1. D17 RFSYNC2 O Receive Fr ame Sync (before the receive elastic store), Transceiver #2.
Product Preview DS21Q55 26 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PIN SYMBOL TYPE DESCRIPTION D2 RSIGF3 O Receive Signaling Freeze Output, Transceiver #3. V16 RSIG F4 O Receive Signaling Freeze Output, Transceiver #4.
Product Preview DS21Q55 27 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PIN SYMBOL TYPE DESCRIPTION C6 TLINK3 I Transmit Link Data, Transceiver #3. T19 TLINK4 I Transmit Link Data, Transceiver #4.
Product Preview DS21Q55 28 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PIN SYMBOL TYPE DESCRIPTION G18 TV SS2 – Transmit Analog Signal Ground. C5 TVSS3 – Transmit Analog Signal Ground.
Product Preview DS21Q55 29 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 3.9 Package DS21Q55 Pin DIAGRAM, 27mm BGA Figure 5 - 1 The diagram shown below is the l ead pattern that will be placed on the target PCB.
Product Preview DS21Q55 30 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 4. PARALLEL PORT The DS21Q55 is controlled via a nonmultiplexed (MUX = 0) or a multiplexed (MUX = 1) bus b y an external microcontroller or microprocessor.
Product Preview DS21Q55 31 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . ADDRESS R/W REGISTER NAME REGISTER ABBREVIATION PAGE .
Product Preview DS21Q55 32 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . ADDRESS R/W REGISTER NAME REGISTER ABBREVIATION PAGE .
Product Preview DS21Q55 33 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . ADDRESS R/W REGISTER NAME REGISTER ABBREVIATION PAGE .
Product Preview DS21Q55 34 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . ADDRESS R/W REGISTER NAME REGISTER ABBREVIATION PAGE .
Product Preview DS21Q55 35 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . ADDRESS R/W REGISTER NAME REGISTER ABBREVIATION PAGE .
Product Preview DS21Q55 36 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 5. SPECIAL PER - CHANNEL REGISTER OPERATION Some of the features described in the data sheet that operate on a per - channel basis use a special method for channel selection.
Product Preview DS21Q55 37 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: PCDR1 Register Description: Per - Chan.
Product Preview DS21Q55 38 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 6. PROGRAMMING MODEL The DS21Q55 register map is divided into three groups: T1 specific features, E1 specific features, and common features.
Product Preview DS21Q55 39 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 6.1 Power - Up Sequence The DS21Q55 contains an on - chip power - up reset function, which automatically clears the writeable register space immediately after power is supplied to the device.
Product Preview DS21Q55 40 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 6.2 Interrupt Handling Various alarms, conditions, and events in the DS21Q55 can cause interrupts. For simplicity, these are all referred to as events in this explanation.
Product Preview DS21Q55 41 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . marked as “double interrupt bits.” An interrupt will be produced when the condition occurs and when it clears.
Product Preview DS21Q55 42 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 7. CLOCK MAP Figure 9 - 1 shows the clock map of the DS21Q55. The routing for the transmit and receive clocks are shown for the various loopback modes and jitter attenuator positions.
Product Preview DS21Q55 43 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 8. T1 FRAMER/FORMATTER CONTROL REGISTERS The T1 framer portion of the DS21Q55 is configured via a set of nine control registers.
Product Preview DS21Q55 44 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: T1R CR2 Register Description: T1 Recei.
Product Preview DS21Q55 45 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: T1TCR1 Register Description: T1 Transm.
Product Preview DS21Q55 46 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: T1TCR2 Register Description: T1 Transm.
Product Preview DS21Q55 47 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: T1CCR1 Register Description: T1 Common.
Product Preview DS21Q55 48 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 8.2 T1 Transmit Transparency The softw are - signalin.
Product Preview DS21Q55 49 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: T1RDMR1 Register Descriptio n: T1 Rece.
Product Preview DS21Q55 50 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 8.4 T1 Information Register Register Name: INFO1 Regi.
Product Preview DS21Q55 51 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . T1 ALARM CRITERIA Table 10 - 1 ALARM SET CRITERIA CLE.
Product Preview DS21Q55 52 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 9. E1 FRAMER/FORMATTER CONTROL REGISTERS The E1 framer portion of the DS21 Q55 is configured via a set of four control registers.
Product Preview DS21Q55 53 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . E1 SYNC/RESYNC CRITERIA Table 11 - 1 FRAME OR MULTIFRAME LEVEL SYNC CRITERIA RESYNC CRITERIA ITU SPEC.
Product Preview DS21Q55 54 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: E1TCR1 Register Description: E1 Transm.
Product Preview DS21Q55 55 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: E1TCR2 Register Description: E1 Transm.
Product Preview DS21Q55 56 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 9.2 Automatic Alarm Generation The device can be programmed to automatically transmit AIS or remote alarm.
Product Preview DS21Q55 57 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 9.3 E1 Information Registers Register Name: INFO3 Reg.
Product Preview DS21Q55 58 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . E1 ALARM CRITERIA Table 11 - 2 ALARM S ET CRITERIA CLEAR CRITERIA ITU SPEC.
Product Preview DS21Q55 59 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 10. COMMON CONTROL AND STA TUS REGISTERS Register Nam.
Product Preview DS21Q55 60 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IDR Register Description: Device Ident.
Product Preview DS21Q55 61 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR2 Register Description: Interrupt M.
Product Preview DS21Q55 62 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SR3 Register Description: Status Regis.
Product Preview DS21Q55 63 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR3 Register Description: Interrupt M.
Product Preview DS21Q55 64 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SR4 Register Description: Status Register 4 Register Address: 1Ch Bit # 7 6 5 4 3 2 1 0 Name - RSA1 RSA0 TMF TAF RMF RCMF RAF Default 0 0 0 0 0 0 0 0 Bit 0/Receive Align Frame Event (RAF).
Product Preview DS21Q55 65 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR4 Register Description: Interrupt M.
Product Preview DS21Q55 66 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 11. I/O PIN CONFIGURATION OPTIONS Register Name: IOCR.
Product Preview DS21Q55 67 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IOCR2 Register Description: I/O Config.
Product Preview DS21Q55 68 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 12. LOOPBACK CONFIGURATION Register Name: LBCR Regist.
Product Preview DS21Q55 69 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Bit 3/Local Loopback (LLB). In this loopback, data will continue to be transmitted as normal through the transmit side of the device.
Product Preview DS21Q55 70 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 12.1 Per - Channel Loopback The per - channel loopbac.
Product Preview DS21Q55 71 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: PCLR3 Register Description: Per - Chan.
Product Preview DS21Q55 72 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 13. ERROR COUNT REGISTERS The DS21Q55 contains four counters that are used to accumulate line coding errors, path errors, and synchronization errors.
Product Preview DS21Q55 73 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 13.1 Line Code Violation Count Register (LCVCR) T1 Operation T1 code violations are defined as bipolar violations (BPVs) or excessive zeros.
Product Preview DS21Q55 74 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: LCVCR1 Register Description: Line Code.
Product Preview DS21Q55 75 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 13.2 Path Code Violation Count Register (PCVCR) T1 O peration The path - code violation - count register records either Ft, Fs, or CRC6 errors in T1 frames.
Product Preview DS21Q55 76 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: PCVCR1 Register Description: Path Code.
Product Preview DS21Q55 77 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . The FOSCR1 (FOSCR1 ) is the most significant word and FOSCR2 is the least significant word of a 16 - bit counter that records frames out of sync.
Product Preview DS21Q55 78 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: FOSCR1 Register Description: Frames Ou.
Product Preview DS21Q55 79 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 14. DS0 MONITORING FUNCTION The DS21Q55 has the ability to monitor one DS0 64kbps channel in the transmit direction and one DS0 channel in the receive direction at the same time.
Product Preview DS21Q55 80 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 14.2 Receive DS0 Monitor Registers Register Name: RDS.
Product Preview DS21Q55 81 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15. SIGNALING OPERATION There are t wo methods to access receive signaling data and provide transmit signaling data: processor - based (i.
Product Preview DS21Q55 82 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15.1.
Product Preview DS21Q55 83 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . register s for T1 mode and PCDR1 - PCDR4 registers for E1 mode. In E1 mode, the user will generally select all channels when doing reinsertion.
Product Preview DS21Q55 84 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RS1 to RS12 Register Description: Rece.
Product Preview DS21Q55 85 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RS1 to RS16 Register Description: Rece.
Product Preview DS21Q55 86 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSCSE1 , RSCSE2 , RSCSE3 , RSCSE4 Regi.
Product Preview DS21Q55 87 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15.2 Transmit Signaling SIMPLIFIED DIAGRAM OF TRANSMIT SIGNALING PATH Figure 17 - 2 15.
Product Preview DS21Q55 88 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15.2.1.1 T1 Mode In T1 ESF framing mode, there are four signaling bits per channel (A, B, C, and D). TS1 – TS12 contain a full multiframe of signaling data.
Product Preview DS21Q55 89 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TS1 to TS16 Register Description: Tran.
Product Preview DS21Q55 90 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TS1 to TS16 Register Description: Tran.
Product Preview DS21Q55 91 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TS1 to TS16 Register Description: Tran.
Product Preview DS21Q55 92 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . R egister Name: TS1 to TS16 Register Description: Tra.
Product Preview DS21Q55 93 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15.2.
Product Preview DS21Q55 94 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SSIE3 Register Description: Software S.
Product Preview DS21Q55 95 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 15.2.3 Software Signaling Insertion Enable Registers, T1 Mode In T1 mode, only registers SSIE1 through SSIE3 are used since t here are only 24 channels in a T1 frame.
Product Preview DS21Q55 96 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 17.2.4 Hardware - Based Transmit Signaling In hardware - based mode, signaling data is input via the TSIG pin.
Product Preview DS21Q55 97 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 16. PER - CHANNEL IDLE CODE GENERATION Channel data can be replaced by an idle code on a per - channel basis in the transmit and receive directions.
Product Preview DS21Q55 98 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 16.1 Idle Code Programming Examples The following e x.
Product Preview DS21Q55 99 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IAAR Register Description: Idle Array .
Product Preview DS21Q55 100 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 1 = insert data from the idle code array into the tr.
Product Preview DS21Q55 101 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TCICE3 Register Description: Transmit.
Product Preview DS21Q55 102 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RCICE3 Register Description: Receive .
Product Preview DS21Q55 103 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 17.
Product Preview DS21Q55 104 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RCBR3 Register Description: Receive C.
Product Preview DS21Q55 105 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TCBR3 Register Description: Transmit .
Product Preview DS21Q55 106 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 18. ELASTIC STORES OPERATION The DS21Q55 contains dual t wo - frame, fully independent elastic stores, one for the receive direction and one for the transmit direction.
Product Preview DS21Q55 107 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: ESCR Register Descripti on: Elastic S.
Product Preview DS21Q55 108 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SR5 Register Description: Status Regi.
Product Preview DS21Q55 109 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information ..
Product Preview DS21Q55 110 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 18.1 Receive Side See the IOCR1 and IOCR2 registers for information on clock and I/O configurations. If the receive - side elastic store is enabled, then the user must provide either a 1.
Product Preview DS21Q55 111 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 18.2 Transmit Side See the IOCR1 and IOCR2 registers for information on clock and I/O configurations. The operation of the transmit elastic store is very similar to the receive side.
Product Preview DS21Q55 112 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . respective network clock signals, the elastic store reset bits (ESCR.2 and ESCR.6) should be toggled from a zero to a one to ensure proper operation.
Product Preview DS21Q55 113 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 19. G.706 INT ERMEDIATE CRC - 4 UPDATING (E1 MODE ONLY) The DS21Q55 can implement the G.706 CRC - 4 recalculation at intermediate path points.
Product Preview DS21Q55 114 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 20. T1 BIT ORIENTED CODE (BOC) CONTROLLER The DS21Q55 contains a BOC generator on the transmit side and a BOC detector on the receive side.
Product Preview DS21Q55 115 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: BOCC Register Description: BOC Control R egister Register Address: 37h Bit # 7 6 5 4 3 2 1 0 Name - - - RBOCE RBR RBF1 RBF0 SBOC Default 0 0 0 0 0 0 0 0 Bit 0/Send BOC (SBOC).
Product Preview DS21Q55 116 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RFDL (RFDL register bit usage when BOCC .
Product Preview DS21Q55 117 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR8 Register Description: Interrupt .
Product Preview DS21Q55 118 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 21. ADDITIONAL (Sa) AND INTERNATIONAL (Si) BIT OPERATION (E1 ONLY) The DS21Q55, when operated in the E1 mode, provides for access to both the Sa and the Si bits via three different methods.
Product Preview DS21Q55 119 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RAF Register Description: Receive Align Frame Register Register Address: C6h Bit # 7 6 5 4 3 2 1 0 Name Si 0 0 1 1 0 1 1 Default 0 0 0 0 0 0 0 0 Bit 0/Frame Al ignment Signal Bit (1).
Product Preview DS21Q55 120 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TAF Register Description: Transmit Align Frame Register Register Address: D0h Bit # 7 6 5 4 3 2 1 0 Name Si 0 0 1 1 0 1 1 Default 0 0 0 1 1 0 1 1 Bit 0/Frame Alignment Signal Bit (1).
Product Preview DS21Q55 121 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 21.
Product Preview DS21Q55 122 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSiNAF Register Description: Receive .
Product Preview DS21Q55 123 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSa4 Register Description: Receive Sa.
Product Preview DS21Q55 124 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSa6 Register Description: Receive Sa.
Product Preview DS21Q55 125 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSa8 Register Description: Receive Sa.
Product Preview DS21Q55 126 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSiAF Register Description: Transmit .
Product Preview DS21Q55 127 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSiNAF Register Description: Transmit.
Product Preview DS21Q55 128 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSa4 Register Description: Transmit S.
Product Preview DS21Q55 129 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSa6 Register Description: Transmit S.
Product Preview DS21Q55 130 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSa8 Register Description: Transmit S.
Product Preview DS21Q55 131 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TSACR Register Description: Transmit .
Product Preview DS21Q55 132 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22. HDLC CONTROLLERS This device has two enhanced HDLC controllers, HDLC #1 and HDLC #2. Each controller is configurable for use with time slots, or Sa4 to Sa8 bits (E1 Mode) or the FDL (T1 Mode).
Product Preview DS21Q55 1 33 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . HDLC CONTROLLER REGISTERS Table 24 - 1 NAME FUNCTIO.
Product Preview DS21Q55 134 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.2 HDLC Configuration Basic configuration of the HDLC controllers is accomplished via the HxTC and HxRC registers.
Product Preview DS21Q55 135 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: H1RC , H2RC Register Description: HDL.
Product Preview DS21Q55 136 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.2.1 FIFO Control Control of the transmit and receive FIFOs is accomplished via the FIFO control (HxFC).
Product Preview DS21Q55 137 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.3 HDLC Mapping 22.3.1 Receive The HDLC controllers need to be assigned a space in the T1/E1 bandwidth in which they will transmit a nd receive data.
Product Preview DS21Q55 138 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: H1RTSBS , H2RTSBS Register Descriptio.
Product Preview DS21Q55 139 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.3.2 Transmit The HxTCS1 – HxTCS4 registers are used to assign the transmit controllers to channels 1 – 24 (T1) or 1– 32 (E1), according to the following table.
Product Preview DS21Q55 140 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: H1TTSBS , H2TTSBS Register Descriptio.
Product Preview DS21Q55 141 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SR6 , SR7 Register Description: HDLC .
Product Preview DS21Q55 142 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR6 , IMR7 Register Description: HDL.
Product Preview DS21Q55 143 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: INFO5 , INFO6 Register Description: H.
Product Preview DS21Q55 144 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.3.3 FIFO Information The transmit FIFO buffer - available register indicates the number of bytes that can be written into the transmit FIFO.
Product Preview DS21Q55 145 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.
Product Preview DS21Q55 146 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.
Product Preview DS21Q55 147 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RFDL Register Description: Receive FD.
Product Preview DS21Q55 148 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 22.
Product Preview DS21Q55 149 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.
Product Preview DS21Q55 150 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.1 LIU Operation The analog AMI/HDB 3 waveform off of the E1 line or the AMI/B8ZS waveform off of the T1 line is transformer coupled into the RTIP and RRING pins of the DS21Q55.
Product Preview DS21Q55 151 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.2.1 Receive Level Indicator and Threshold Interrupt The DS21 Q 55 reports the signal strength at RTIP and RRING in 2.
Product Preview DS21Q55 152 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.3 LIU Transm itter The DS21Q55 uses a phase - lock loop along with a precision digital - to - analog converter (DAC) to create the waveforms that are transmitted onto the E1 or T1 line.
Product Preview DS21Q55 153 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.4 MCLK Prescaler A 16.384MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz clock must be applied at MCLK.
Product Preview DS21Q55 154 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.
Product Preview DS21Q55 155 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . E1 Mode L2 L1 L0 A PPLICATION N (1) RETURN LOSS Rt (1) 0 0 0 75O normal 1:2 NM 0 0 0 1 120O normal 1:2 NM 0 1 0 0 75O with high return loss* 1:2 21dB 6.
Product Preview DS21Q55 156 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TLBC Register Description: Transmit L.
Product Preview DS21Q55 157 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: LIC2 Register Description: Line Inter.
Product Preview DS21Q55 158 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: LIC3 Register Description: Line Inter.
Product Preview DS21Q55 159 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: LIC4 Register Description: Line Inter.
Product Preview DS21Q55 160 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: INFO2 Register Description: Informati.
Product Preview DS21Q55 161 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: CCR4 Register Description: Common Con.
Product Preview DS21Q55 162 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Regi ster Name: SR1 Register Description: Status Reg.
Product Preview DS21Q55 163 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR1 Registe r Description: Interrupt.
Product Preview DS21Q55 164 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.8 Recommended Circuits BASIC INTERFACE Figure 25 - 4 NOTES: 1) All resistor values are ±1%. 2) Resistors R should be set to 60O each if the internal receive - side termination feature is enabled.
Product Preview DS21Q55 165 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . PROTECTED INTERFAC E USING INTERNAL RECEIVE TERMINATION Figure 25 - 5 NOTES: 1) All resistor values are ±1%.
Product Preview DS21Q55 166 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 23.9 Component Specifications TRANSFORMER SPECIFICATIONS Table 25 - 1 SPECIFIC ATION RECOMMENDED VALUE Turns Ratio 3.
Product Preview DS21Q55 167 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . E1 TRANSMIT PULSE TEMPLATE Figure 25 - 6 T1 TRANSMIT PULSE TEMPLATE Figure 25 - 7 0 -0.1 -0.2 0.1 0.2 0.
Product Preview DS21Q55 168 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . JITTER TOLERANCE (T1 MODE) Figure 25 - 8 JITTER TOLE RANCE (E1 MODE) Figure 25 - 9 FREQUENCY (Hz) UNIT INTERVALS (UIpp) 1K 100 10 1 0.
Product Preview DS21Q55 169 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . JITTER ATTENUATION (T1 MODE) Figure 25 - 10 JITTER ATTENUATION (E1 MODE) Figure 25 - 11 FREQUENCY (Hz) 0dB -20dB -40dB -60dB 1 10 100 1K 10K JITTER ATTENUATION (dB) 100K TR 62411 (Dec.
Product Preview DS21Q55 170 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 24. PROGRAMMABLE IN - BAND LOOP CODE GENERATION AND DETECTION The DS21Q55 has the ability to generate and detect a repeating bit pattern from 1 bit to 8 bits or 16 bits in length.
Product Preview DS21Q55 171 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IBCC Register Description: In - Band .
Product Preview DS21Q55 172 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: TCD1 Register Description: Transmit C.
Product Preview DS21Q55 173 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RUPCD1 Register Description: Receive .
Product Preview DS21Q55 174 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Regist er Name: RDNCD1 Register Description: Receive.
Product Preview DS21Q55 175 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RDNCD2 Register Description: Receive .
Product Preview DS21Q55 176 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: RSCD1 Register Description: Receive -.
Product Preview DS21Q55 177 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 25. BERT FUNCTION The BERT (Bit Error Rate Tester) block can generate and detect both pseudorandom and repeating - bit patterns.
Product Preview DS21Q55 178 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 25.
Product Preview DS21Q55 179 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: BC2 Register Description: BERT Contro.
Product Preview DS21Q55 180 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: BIC Register Description: BER T Inter.
Product Preview DS21Q55 181 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: SR9 Register Description: Status Regi.
Product Preview DS21Q55 182 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IMR9 Register Description: Interrupt .
Product Preview DS21Q55 183 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 25.
Product Preview DS21Q55 184 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 25.3 BERT Bit Counter Once BERT has achieved synchronization, this 32 - bit counter will increment for each data bit (i.
Product Preview DS21Q55 185 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 25.4 BERT Error Counter Once BERT has achieved synchronization, this 24 - bit counter will increment for each data bit received in error.
Product Preview DS21Q55 186 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 26. PAYLOAD ERROR INSERTION FUNCTION An error - insertion function is available in the DS21Q55 and is used to create errors in t he payload portion of the T1 frame in the transmit path.
Product Preview DS21Q55 187 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: ERC Register Description: Error Rate .
Product Preview DS21Q55 188 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 26.1 Number Of Error Registers The number of error registers determine how many errors will be generated.
Product Preview DS21Q55 189 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 26.1.1 Number Of Errors Left Register The host can read the NOELx registers at any time to determine how many errors are left to be inserted.
Product Preview DS21Q55 190 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 27. INTERLEAVED PCM BUS OPERATION In many architectures, the PCM outputs of individual framers are combined into higher speed PCM buses to simplify transport across the system backplane.
Product Preview DS21Q55 191 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: IBOC Register Description: Interleave.
Product Preview DS21Q55 192 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . IBO EXAMPLE Figure 29 - 1 RSYSCLK TSYSCLK RSYNC TSSYNC RSIG TSIG TSER RSER RSYSCLK TSYSCL K RSIG TSIG TSER RSER RSYSCLK TSYSCLK RSIG TSIG TSER RSER RSYSCLK TSYSCLK RSIG TSIG TSER RSER 8.
Product Preview DS21Q55 193 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 28. EXTENDED SYSTEM INFORMATION BUS (ESIB) The ESI B allows two DS21Q55s to share an 8 - bit CPU bus for the purpose of reporting alarms and interrupt status as a group.
Product Preview DS21Q55 194 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: ESIBCR1 Register Description: Extende.
Product Preview DS21Q55 195 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: ESIBCR2 R egister Description: Extend.
Product Preview DS21Q55 196 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Register Name: ESIB1 Register Description: Extended .
Product Preview DS21Q55 197 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 29. PROGRAMMABLE BACKPLANE CLOCK SYNTHESIZER The DS21Q55 contains an on - chip clock synthesizer that generates a user - selectable clock referenced to the recovered receive clock (RCLK).
Product Preview DS21Q55 198 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 30.
Product Preview DS21Q55 199 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 31. JTAG - BOUNDARY - SCAN ARCHITECTURE AND TEST - ACCESS PORT The DS21Q55 is an MCM consisting of 4 DS2155s.
Product Preview DS21Q55 200 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TAP Controller State Machine The TAP controller is a finite state machine t hat responds to the logic level at JTMS on the rising edge of JTCLK (Figure 34 - 2) .
Product Preview DS21Q55 201 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . Select - IR - Scan All test registers retain their previous state. The instruction register will remain unchanged during this state.
Product Preview DS21Q55 202 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TAP CONTROLLER STATE DIAGRAM Figure 34 - 2 1 0 0 1 1.
Product Preview DS21Q55 203 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 31.1 Instruction Register The instruction register contains a shift register as well as a latched parallel output and is 3 bits in length.
Product Preview DS21Q55 204 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . SAMPLE/P RELOAD This is a mandatory instruction for the IEEE 1149.1 specification that supports two functions.
Product Preview DS21Q55 205 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . DS21552 0002h 31.2 Test Registers IEEE 1149.1 requires a minimum of two test registers: the bypass register and the boundary scan register.
Product Preview DS21Q55 206 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . BOUNDARY SCAN CONTROL BITS Table 34 - 4 NXA = Not Ex.
Product Preview DS21Q55 207 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . BIT PIN SYMBOL TYPE CONTROL BIT DESCRIPTION 53 48 TSIG I 52 49 TESO (NXA) O 51 50 TDATA (NXA) I 50 51 TSYSCLK I 49 52 TSSYNC I 48 53 TCHCLK O 47 - ESIBS1.
Product Preview DS21Q55 208 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . BIT PIN SYMBOL TYPE CONTROL BIT DESCRIPTION 7 97 RFSYNC O 6 – RSYNC.cntl – 0 = RSYNC is an input; 1 = RSYNC is an output 5 98 RSYNC I/O 4 99 RLOS/LOTC O 3 100 RSYSCLK I 32.
Product Preview DS21Q55 209 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE ESF TIMING Figure 35 - 2 NOTES: 1) RSYNC in frame mode (IOCR1.4 = 0) and double wide frame sync is not enabled (IOCR1.
Product Preview DS21Q55 210 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE BOUNDARY TIMING (With Elastic Store Disabled) Figure 35 - 3 NOTES: 1) RCHBLK is programmed to block channel 24.
Product Preview DS21Q55 211 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE 1.544MHz BOUNDARY TIMI NG (With Elastic Store Enabled ) Figure 35 - 4 NOTES: 1) RSYNC is in the output mode (IOCR1.
Product Preview DS21Q55 212 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE 2.048MHz BOUNDARY TIMING (With Elastic Store Enabled) Figur e 35 - 5 NOTES: 1) RSER data in channels 1, 5, 9, 13, 17, 21, 25, and 29 are forced to one.
Product Preview DS21Q55 213 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE D4 TIMING Figure 35 - 6 NOTES: 1) TSYNC in the frame mode (IOCR1.2 = 0) and double - wide frame sync is not enabled (IOCR1.
Product Preview DS21Q55 214 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE ESF TIMING Figure 35 - 7 NOTES: 1) TSYNC in frame mode (IOCR1.2 = 0) and double - wide frame sync is not enabled (IOCR1.
Product Preview DS21Q55 215 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE BOUNDARY TIMING (With Elastic Store Disabled) Figure 35 - 8 NOTES: 1) TSYNC is in the output mode (IOCR1.
Product Preview DS21Q55 216 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE 1.
Product Preview DS21Q55 217 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE 2.048MHz BOUNDARY TIMING (With Elastic Store Enabled) Figure 35 - 11 NOTES: 1) TSER data in channels 1, 5, 9, 13, 17, 21, 25, and 29 is ignored.
Product Preview DS21Q55 218 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 32.2 E1 Mode RECEIVE SIDE TIMING Figure 35 - 11 NOTES: 1) RSYNC in frame mode (IOCR1.5 = 0). 2) RSYNC in multiframe mode (IOCR1.
Product Preview DS21Q55 219 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE BOUNDARY TIMING (With Elastic Store Disabled) Fi gure 35 - 12 NOTES: 1) RCHBLK is programmed to block channel 1.
Product Preview DS21Q55 220 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE BOUNDARY TIMING, R SYSCLK = 1.
Product Preview DS21Q55 221 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE BOUNDARY TIMING, RSYSCLK = 2.048MHz (With Elastic Store Enabled) Figure 35 - 14 NOTES: 1) RSYNC is in the output m ode (IOCR1.
Product Preview DS21Q55 222 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE IBO CHANNEL INTERLEAVE MODE TIMING Figure 35 - 15 NOTES: 1) 4. 096MHz bus configuration. 2) 8.192MHz bus configuration.
Product Preview DS21Q55 223 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE IBO FRAME INTERLEAVE MODE TIMING Figure 35 - 16 NOTES: 1) 4.096MHz bus configuration. 2) 8.192MHz bus configuration.
Product Preview DS21Q55 224 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . G.802 TIMING, E1 MODE ONLY Figure 35 - 17 NOTE: 1) RCHBLK or TCHBLK programmed to pulse high during timeslots 1 through 15, 17 through 25, and bit 1 of timeslot 26.
Product Preview DS21Q55 225 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE TIMING Fig ure 35 - 18 NOTES: 1) TSYNC in frame mode (IOCR1.2 = 0). 2) TSYNC in multiframe mode (IOCR1.
Product Preview DS21Q55 226 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE BOUNDARY TIMING (With Elastic Store Disabled) Figure 35 - 19 NOTES: 1) TSYNC is in the output mode (IOCR1.
Product Preview DS21Q55 227 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE BOUNDARY TIMING, TSYSCLK = 1.544MHz (With Elas tic Store Enabled) Figure 35 - 20 NOTES: 1) The F - bit position in the TSER data is ignored.
Product Preview DS21Q55 228 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE BOUNDARY TIMING, TSYSCLK = 2.048MHz (With Elastic Store Enabled) Figure 35 - 21 NOTE: 1) TCHBLK is programme d to block channel 31.
Product Preview DS21Q55 229 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT IBO CHANNEL INTERLEAVE MODE TIMING Figure 35 - 22 NOTES: 1) 4.096MHz bus configuration. 2) 8.192MHz bus configuration.
Product Preview DS21Q55 230 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT IBO FRAME INTERLEAVE MODE TIMING Figure 35 - 23 NOTES: 1) 4.096MHz bus configuration. 2) 8.192MHz bus configuration.
Product Preview DS21Q55 231 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 33. OPERATING PARAMETERS ABSOLUTE MAXIMUM RATINGS* Voltage Range on Any Pin Relative to Ground - 1.0V to +6.
Product Preview DS21Q55 232 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECOMMENDED DC OPERATING CONDITIONS (0 ° C to +70 ° C for DS21Q55; - 40 ° C to +85 ° C for DS21Q55N) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Logic 1 V IH 2.
Product Preview DS21Q55 233 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 34. AC TIMING PARAMETERS AND DIAGRAMS Capacitive test loads are 40pF for bus signals, 20pF for all others.
Product Preview DS21Q55 234 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . INTEL BUS READ TIMING (BTS = 0 / MUX = 1) Figure 37 .
Product Preview DS21Q55 235 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . MOTOROLA BUS TIMING (BTS = 1 / MUX = 1) Figure 37 - .
Product Preview DS21Q55 236 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 34.2 Nonmultiplexed Bus AC Characteristics AC CHARACTERISTICS – NONMULTIPLEXED PARALLEL PORT (MUX = 0) (0 ° C to +70 ° C; V DD = 3.
Product Preview DS21Q55 237 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . INTEL BUS READ TIMING (BTS = 0 / MUX = 0) Figure 37 - 4 INTEL BUS WRITE TIMING (BTS = 0 / MUX = 0) Figure 37 - 5 Address Valid Data Valid A0 to A7 D0 to D7 WR* CS* RD* 0ns min.
Product Preview DS21Q55 238 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . MOTOROLA BUS READ TIMING (BTS = 1 / MUX = 0) Figure 37 - 6 MOTOROLA BUS WRITE TIMING (BTS = 1 / MUX = 0) Figure 37 - 7 Address Valid Data Valid A0 to A7 D0 to D7 R/W* CS* DS* 0ns min.
Product Preview DS21Q55 239 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 34.3 Receive Side AC Characteristics AC CHARACTERISTICS – RECEIVE SIDE (0 ° C to +70 ° C; V DD = 3.
Product Preview DS21Q55 240 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . NOTES: 1) Jitter attenuator enabled in the receive path. 2) Jitter attenuator disabled or enabled in the transmit path.
Product Preview DS21Q55 241 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE SIDE TIMING, ELASTIC STORE ENABLED (T1 MODE) Figure 37 - 9 NOTES: 1) RSYNC is in the output mode.
Product Preview DS21Q55 242 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . RECEIVE LINE INTERFACE TIMI NG Figure 37 - 10 t F t .
Product Preview DS21Q55 243 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 34.4 Transmit AC Characteristics AC CHARACTERISTICS – TRANSMIT SIDE (0 ° C to +70 ° C; V DD = 3.3V ± 5% for DS21Q55; - 40 ° C to +85 ° C; V DD = 3.
Product Preview DS21Q55 244 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 4) TSYSCLK = 8.192MHz. 5) TSYSCLK = 16.384MHz TRANSMIT SIDE TIMING Figure 37 - 11 4) TCHCLK and TCHBLK are synchronous with TCLK when the transmit - side elastic store is disabled.
Product Preview DS21Q55 245 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT SIDE TIMING, EL ASTIC STORE ENABLED Figure .
Product Preview DS21Q55 246 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . TRANSMIT LINE INTERFACE TIMING Figure 37 - 13 TCLKO .
Product Preview DS21Q55 247 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information . 35.
Product Preview DS21Q55 248 of 248 0121 03 Please contact telecom.support@dalsemi.com or search http://www.maxim - ic.com for updated information ..
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