Instruction/ maintenance manual of the product ICA93LV Calibre UK
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Revision 1.7 09/12/1999 ICA93LV I 2 C Communications A dapter User Ma nual Contents 1. Introduction 1 1.1. Pack ing List 1 2. Configuring the Adapter 2 2.1. Setting the Adapter Base Addres s 2 2.2. W ait State Generator 2 2.3. Interrupt Generation 3 2.
Revision 1.7 Page 1 of 27 09/12/1999 1. Introduction The I 2 C Com m unications Adapter is a half length PC inter face c ard des igned to fit any IBM PC com patible expansion slot. Based on the Philips PCF8584 bus controller, it f eatures full I 2 C bi-direc tional com patibility as either a m aster or slave.
Revision 1.7 Page 2 of 27 09/12/1999 2. Configuring the A dapter NOTE: MANY COM PONENT S ON THE ADA PTER CARD A RE STATIC SENSIT IVE. OBSERVE NORM AL STA TIC SENSIT IVE PRECA UTIO NS WHEN HANDLING THE CA RD! The adapter is supplied in a s tandard configuration which should suit most applications.
Revision 1.7 Page 3 of 27 09/12/1999 Important Note: Due to the internal operation of the ICA93, it must not be accessed o ver the PC bus (read or w ritten ) more than o nce every nine of it s ow n clock cycles. The ICA93 is clocked at 12MHz ; therefore it MU ST NOT be accessed more than once ev ery 0.
Revision 1.7 Page 4 of 27 09/12/1999 3. Conn ecting th e A dapter to your System 3.1. Connec tor Pinout All external connec tions are m ade via a 9 way “D” sock et: Pin Norm al Mode 10 V 20 V 30 V.
Revision 1.7 Page 5 of 27 09/12/1999 4. Getting Started 4.1. Resetting t he A dapter A reset forces the adapter into a well defined state, ready for initialisation. T he card uses the sam e reset line as the PC so either a power up or hard rese t (press the <RESET> button on your PC) will suff ice.
Revision 1.7 Page 6 of 27 09/12/1999 5. Using the Utilities Each utility is documented in a s tandard for m at, which lists its nam e, us age, function, and ef fect on the adapter is given. Following a reset, the adapter should be setup prior to any data transf er.
Revision 1.7 Page 7 of 27 09/12/1999 Parameters are: int controladdress address of I 2 C control r egister. T his is equal to 1+( base address of adapter s et by links on circuit boar d). Value Returned: int <status> where status is an integer fr om 0x 00 to 0xFF which indic ates the curr ent status of I 2 C Com munications Adapter .
Revision 1.7 Page 8 of 27 09/12/1999 { int base, slv, setnac k; base = 0x310; /* Adapter’s bas address = 0x 310 (hex) */ slv = 0xa0; /* I 2 C Address of s lave, this is a typical */ /* write for an .
Revision 1.7 Page 9 of 27 09/12/1999 /* This will read a by te of data fr om a slave previously addressed */ /* by and with acknowledge already disabled by sendaddress.
Revision 1.7 Page 10 of 27 09/12/1999 #include <dos.h> /* Optional, but rec omm ended if your compiler */ /* supports DO S I/0 functions */ #include <i2c.
Revision 1.7 Page 11 of 27 09/12/1999 Name: setup (baseaddr%, own%, sc lk%) Usage: call setup(bas eaddr%, own%, sclk %) Function: procedure to s et up I 2 C Comm unic ations Adapter. Parameters are: baseaddr% base address of adapter s et by links on circuit board.
Revision 1.7 Page 12 of 27 09/12/1999 baseaddr% = &h310 ‘* adapter’s base addr ess = 0x310 ( hex) * controladdres s% = baseaddr % + 1 status% = FNgets tatus%(contr oladdress%) print”I 2 C Com m unications Adapter Status = “;status % ‘* This will read the I 2 C Comm unic ations Adapter’s c urrent status * 5.
Revision 1.7 Page 13 of 27 09/12/1999 setnack % this controls whether the I 2 C Com munic ations Adapter trans m its and Ack nowledge down the I 2 C Bus on reception of a byte. The last byte received during a transf er m ust not be ac knowledged, in all other c ases ack nowledge mu st be enabled.
Revision 1.7 Page 14 of 27 09/12/1999 Function: procedure to send a Stop (end of c omm unica tion signal) down the I 2 C Bus, ending a transm ission or reception with a slave that was address previously by sendaddress .
Revision 1.7 Page 15 of 27 09/12/1999 slv% = &ha1 ‘* I 2 C Address of slave, this is a ty pical read addres s * ‘* for an I 2 C s tatic RAM or EEPROM* setnack % = 0 ‘* Enable Ack nowledge (s.
Revision 1.7 Page 16 of 27 09/12/1999 baseaddress is the addres s at which the adapter has been ins talled, e.g. 310H ownaddress I2C address to which the adapter is to res pond in slave mode. T his f orm s the upper 7 bits of the 8 bit addres s, the lowest bit being the read (1) or write (0) bit.
Revision 1.7 Page 17 of 27 09/12/1999 Setnack 1 for no ac knowledge 0 for ack nowledge. Paramete rs returned I 2 Cdata, the data read, if a time-out oc curs the Er rCode 8005H is returned. Prerequisites Adapter m ust be conf igured using setup, start and read addr ess sent by sendaddress.
Revision 1.7 Page 18 of 27 09/12/1999 getstatus Function spec ification: Int getstatus ( ) Paramete rs returned I 2 Cstatus, the current value of the bus status . Prerequisites Adapter mus t be configur ed using setup. Functional desc ription The f unction reads status word f rom the adapter and returns it.
Revision 1.7 Page 19 of 27 09/12/1999 W hen all the by tes have been transm itted a stop is issued and the total number of bytes is returned. Sendby tes can only be used in mas ter write m ode.
Revision 1.7 Page 20 of 27 09/12/1999 Getbytes can only be used in m aster read m ode. slavelastbyte Function spec ification void slavelastbyte( ) Paramete rs returned none.
Revision 1.7 Page 21 of 27 09/12/1999 6. Furth er Informatio n The f ollowing references m ay be found usef ul when using the adapter: Philips Semic onductor s Tec hnic al Handbook Book 4 Parts 12a and 12b. T hese give details of the I2C com patible ICs, and the I 2 C Bus specific ation.
Revision 1.7 Page 22 of 27 09/12/1999 7. T he Real-Time Bu s Mo nitor The pr ogram REALTIM1.EX E in the MONTO R director y is a completely non-invasive real-tim e bus monitor which records ac tivity on an I 2 C-bus , post-proc esses the data and s tores the res ults in an ASCII file.
Revision 1.7 Page 23 of 27 09/12/1999 A ppendix A I 2 C Communications A dapter S tatus Codes This is an eight bit register, read using the gets tatus routine.
Revision 1.7 Page 24 of 27 09/12/1999 A ppendix B – I 2 C Communications A dapter Control Codes The Control Regis ter should norm ally be w ritten using the setup, s endaddress and s endstop routines.
Revision 1.7 Page 25 of 27 09/12/1999 A ppendix C - T he M ost Commonly A sked I 2 C Questio ns General Que stions Question Will my adapter work in a Pentium PC? Answer Y es and there is no need to alter LK 4 f rom the position in which your adapter was shipped.
Revision 1.7 Page 26 of 27 09/12/1999 W indows 95 START - Run regedit HKEY_LOCAL_MACHINE | |--S YS TEM | |--CurrentControlSet | |--S ervi ces | |--Cl ass | |--W inRT | |--W inRTdev0 | |--Parameter s |.
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