Instruction/ maintenance manual of the product CY7C1231H Cypress
Go to page of 12
2-Mbit (128K x 18) Flow-Through SRAM with NoBL™ Architecture CY7C1231H Cypress Semiconductor Corpora tion • 198 Champion Cou rt • San Jose , CA 95134-1 709 • 408-943-2 600 Document #: 001-00207 Rev .
CY7C1231H Document #: 001-00207 Rev . *B Page 2 of 12 Selection Guide 133 MHz Unit Maximum Access T i me 6.5 ns Maximum Operating Current 225 mA Maximum CMOS S tandby Current 40 mA Pin Configuration 1.
CY7C1231H Document #: 001-00207 Rev . *B Page 3 of 12 Pin Definitions Name I/O Descrip tion A 0 , A 1 , A Input- Synchronous Address Inputs used to select one of th e 128K address locations . Sampled at the rising edge of the CLK. A [1:0] are fed to the two-bit burst counter .
CY7C1231H Document #: 001-00207 Rev . *B Page 4 of 12 Functional Overview The CY7C1231H is a synchronous flow-through burst SRAM designed specifically to el iminate wait states during Write-Read transitions. All synchronous inputs pass through input registers controlled by the rising edge of the clock.
CY7C1231H Document #: 001-00207 Rev . *B Page 5 of 12 Linear Burst Address T able (MODE = GND) First Address A1, A0 Second Address A1, A0 Third Address A1, A0 Fourth Address A1, A0 00 01 10 1 1 01 10 .
CY7C1231H Document #: 001-00207 Rev . *B Page 6 of 12 Maximum Ratings (Above which the useful life may be impaired. For user guide- lines, not tested.) S torage T emperature ............. .............. ...... –65°C to +150°C Ambient T emperature with Power Applied .
CY7C1231H Document #: 001-00207 Rev . *B Page 7 of 12 Cap acit ance [1 1] Parameter Description T est Conditions 100 TQFP Max. Unit C IN Input Capacitance T A = 25°C , f = 1 MHz, V DD = 3.
CY7C1231H Document #: 001-00207 Rev . *B Page 8 of 12 Switching Characteristics Over the Operating Range [12, 13] Parameter Description -133 Unit Min. Max. t POWER V DD (T ypical) to the first Access [14] 1 ms Clock t CYC Clock Cycle T ime 7.5 ns t CH Clock HIGH 2.
CY7C1231H Document #: 001-00207 Rev . *B Page 9 of 12 Switching W aveforms Read/Write W aveforms [18, 19, 20] Notes: 18. For this waveform ZZ is tied LOW. 19. When CE is LOW , CE 1 is LOW , CE 2 is HIGH and CE 3 is LOW. When CE is HIGH, CE 1 is HIGH or CE 2 is LOW or CE 3 is HIGH.
CY7C1231H Document #: 001-00207 Rev . *B Page 10 of 12 NOP , ST ALL and Des elect Cyc les [1 8, 19, 21] ZZ Mode T iming [22, 23] Notes: 21. The IGNORE CLOCK EDGE or ST ALL cycle (Clock 3) illustrated CEN being used to create a pause. A writ e is not perform ed during this cycle.
CY7C1231H Document #: 001-00207 Rev . *B Page 1 1 of 12 © Cypress Semi con duct or Cor po rati on , 20 06 . The information contained he re i n is su bj ect to ch ange without notice. Cypress S em ic on duct or Corpo ration assu mes no resp onsib ility for th e u se of any circuitry o ther than circui try embodied i n a Cypress prod uct.
CY7C1231H Document #: 001-00207 Rev . *B Page 12 of 12 Document History Page Document Title: CY7C1231H 2-Mbit (128K x 18) Flow-Through SRAM with NoBL™ Archite ctur e Document Numb er: 001-00207 REV .
An important point after buying a device Cypress CY7C1231H (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Cypress CY7C1231H yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Cypress CY7C1231H - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cypress CY7C1231H you will learn all the available features of the product, as well as information on its operation. The information that you get Cypress CY7C1231H will certainly help you make a decision on the purchase.
If you already are a holder of Cypress CY7C1231H, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cypress CY7C1231H.
However, one of the most important roles played by the user manual is to help in solving problems with Cypress CY7C1231H. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cypress CY7C1231H along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
