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Cypress CY7C1298H - page 1
1-Mbit (64K x 18) Pipelined DCD Sync SRAM CY7C1298H Cypress Semiconductor Corpora tion • 198 Champion Cou rt • San Jose , CA 95134-1 709 • 408-943-2 600 Document #: 38-05665 Rev . *B Revised July 5, 2006 Features • Registered inp uts and outputs for pipelined op er ation • Optimal for pe rformance (Double-Cy cle deselect) — Depth exp an ...
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Cypress CY7C1298H - page 2
CY7C1298H Document #: 38-05665 Rev . *B Page 2 of 16 Functional Block Diagram ADDRESS REGISTER ADV CLK BURST COUNTER AND LOGIC CLR Q1 Q0 ADSC BW B BW A CE 1 DQ B, DQP B BYTE WRITE REGISTER DQ A , DQP A BYTE WRITE REGISTER ENABLE REGISTER OE SENSE AMPS MEMORY ARRAY ADSP 2 A [1:0] MODE CE 2 CE 3 GW BWE PIPELINED ENABLE DQ s, DQP A DQP B OUTPUT REGIST ...
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Cypress CY7C1298H - page 3
CY7C1298H Document #: 38-05665 Rev . *B Page 3 of 16 Pin Configurations 100-Pin TQFP To p V i e w A NC NC V DDQ V SSQ NC DQP A DQ A DQ A V SSQ V DDQ DQ A DQ A V SS NC V DD ZZ DQ A DQ A V DDQ V SSQ DQ A DQ A NC NC V SSQ V DDQ NC NC NC NC NC NC V DDQ V SSQ NC NC DQ B DQ B V SSQ V DDQ DQ B DQ B V DD NC V SS DQ B DQ B V DDQ V SSQ DQ B DQ B DQP B NC V S ...
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Cypress CY7C1298H - page 4
CY7C1298H Document #: 38-05665 Rev . *B Page 4 of 16 Pin Descriptions Pin T ype Description A0, A 1 , A Input- Synchronous Address Inputs used to select one of the 64K add ress locations . Sampled at the rising edg e of the CLK if ADSP or ADSC is active LOW , and CE 1 , CE 2 , and CE 3 are sampled active. A [1:0] are fed to the two-bit counter . BW ...
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Cypress CY7C1298H - page 5
CY7C1298H Document #: 38-05665 Rev . *B Page 5 of 16 Functional Overview All synchronous inputs pass through input registers controlled by the rising edge of the clock. All data outputs pass through output registers controlled b y the rising edge of the clock. The CY7C1298H supports secondary cache in systems utilizing either a linear or interleave ...
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Cypress CY7C1298H - page 6
CY7C1298H Document #: 38-05665 Rev . *B Page 6 of 16 Interleaved ‘Burst Address T able (MODE = Floating or V DD ) First Address A1, A0 Second Address A1, A0 Third Address A1, A0 Fourth Address A1, A0 00 01 10 1 1 01 00 1 1 10 10 1 1 00 01 1 1 10 01 00 Linear Burst Address T ab le (MODE = GND) First Address A1, A0 Second Address A1, A0 Third Addre ...
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Cypress CY7C1298H - page 7
CY7C1298H Document #: 38-05665 Rev . *B Page 7 of 16 T ruth T able for Read/W rite [2,3] Function GW BWE BW A BW B Read H H X X Read H L H H Write byte A – (DQ A and DQP A )H L L H Write byte B – (DQ B and DQP B )H L H L Write all bytes H L L L Write all bytes L X X X ZZ Mode Electrical Characteristics Parameter Description T est Conditions Min ...
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Cypress CY7C1298H - page 8
CY7C1298H Document #: 38-05665 Rev . *B Page 8 of 16 Maximum Ratings (Above which the useful life may be impaired. For user guide- lines, not tested.) S torage T emperature ................. .............. .... –65°C to + 150° Ambient T e mperature with Power Applied ........... ............................ ..... –55°C to + 125°C Supply V o ...
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Cypress CY7C1298H - page 9
CY7C1298H Document #: 38-05665 Rev . *B Page 9 of 16 Cap acit ance [9] Parameter D escrip tion T est Conditions 100 TQFP Max. Unit C IN Input Capacitance T A = 25 ° C, f = 1 MHz, V DD = 3.3V V DDQ = 2.5V 5p F C CLK Clock Input Capacitance 5 pF C I/O Input/Output Capacitance 5 pF Thermal Characteristics [9] Parameter Description T est Cond itions 1 ...
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Cypress CY7C1298H - page 10
CY7C1298H Document #: 38-05665 Rev . *B Page 10 of 16 Switching Characteristics Over the Operating Range [14, 15] Parameter Description 166 MHz 133 MHz Unit Min. Max. Min. Max. t POWER V DD (T ypical) to the first Access [10] 11 m s Clock t CYC Clock Cycle T ime 6.0 7.5 ns t CH Clock HIGH 2.5 3.0 ns t CL Clock LOW 2.5 3.0 ns Output Times t CO Data ...
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Cypress CY7C1298H - page 11
CY7C1298H Document #: 38-05665 Rev . *B Page 1 1 of 16 Switching W aveforms Read Timing [16] Note: 16. On this diagra m, 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. t CYC t CL CLK ADSP t ADH t ADS ADDRESS t CH OE ADSC CE t AH t AS A1 t CEH t CES G W, BWE,BW Data Out (Q) Hi ...
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Cypress CY7C1298H - page 12
CY7C1298H Document #: 38-05665 Rev . *B Page 12 of 16 Wri te Tim i n g [16, 17] Note: 17. Full width write can be initia ted by either GW LOW; or by GW HIGH, BWE LOW and BW [A:B] LOW. Switching W aveforms (continued) t CYC t CL CLK ADSP t ADH t ADS ADDRESS t CH OE ADSC CE t AH t AS A1 t CEH t CES BWE, BW [A:B] ADV BURST READ BURST WRITE D(A2) D(A2 ...
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Cypress CY7C1298H - page 13
CY7C1298H Document #: 38-05665 Rev . *B Page 13 of 16 Read/Write T iming [16, 18, 19] Notes: 18. The data bus (Q) rema ins in High-Z foll owing a WRITE cycle, unless a new read access initiated by ADSP or ADSP . 19. GW is HIGH. Switching W aveforms (continued) t CYC t CL CLK ADSP t ADH t ADS ADDRESS t CH OE ADSC CE t AH t AS A2 t CEH t CES Data Out ...
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Cypress CY7C1298H - page 14
CY7C1298H Document #: 38-05665 Rev . *B Page 14 of 16 ZZ Mode T iming [20, 21] Notes: 20. Device must be deselected when entering ZZ mode. See tru th ta ble for all possible signal conditions to deselect t he device. 21. I/Os are in High -Z when exiting ZZ sleep mode. Switching W aveforms (continued) t ZZ I SUPPLY CLK ZZ t ZZREC A LL INPUTS (except ...
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Cypress CY7C1298H - page 15
CY7C1298H Document #: 38-05665 Rev . *B Page 15 of 16 © Cypress Semi con duct or Cor po rati on , 20 06 . The information con t a in ed he re i n is su bject to change wi t hou t n oti ce. C ypr ess S em ic onduct or Corporation assumes no resp onsibility f or the u se of any circuitry o ther than circui try embodied i n a Cypress prod uct. Nor do ...
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Cypress CY7C1298H - page 16
CY7C1298H Document #: 38-05665 Rev . *B Page 16 of 16 Document History Page Document Title: CY7C1298H 1-Mbit (64K x 18) Pipelined DCD Sync SRAM Document Number: 38-05665 REV . ECN NO. Issue Date Orig. of Change Description of Change ** 3438 96 See ECN PCI New Data Sheet *A 430678 See ECN NXR Changed address of Cypress Semicond uctor Corporation on ...
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