CY7C456 datasheet(8/23 Pages) CYPRESS

Part #	CY7C456

Description	512 x 18, 1K x 18, and 2K x 18 Cascadable Clocked FIFOs with Programmable Flags

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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CY7C455

CY7C456

CY7C457

Document #: 38-06003 Rev. *A

Page 8 of 23

Switching Waveforms (continued)

tSMRP

tMRR

tSCMR

tHMRP

tCKH

tSCMR

tFTP

tSD

tHD

tSMRP

tHMRP

tCKH

tAP

tOHMR

tOHP

tAMR

VALID DATA

ALL DATA

OUTPUTS LOW

LAST

VALID

READ

PGM

READ

LAST

WORD

PGM

WORD

WORD 1

WORD 2

LAST

VALID

WRITE

PGM

WRITE

FIRST

WRITE

SECOND

WRITE

c455-9

Master Reset (Programming Mode with Free-Running Clocks) Timing Diagram

tSMRP

c455-10

tMRR

tSCMR

tHMRP

tCKH

tSCMR

tHEN

tFTP

tSMRP

tAP

tOHMR

tOHP

tAMR

VALID DATA

PGM WORD

ALL DATA

OUTPUTS LOW

LAST

WORD

PGM

WORD

WORD 1

WORD 2

tCKL

tCKW

tSEN

tCKR

tCKL

tCKH

tHEN

tSEN

PGM

READ

LAST

VALID

WRITE

PGM

WRITE

FIRST

WRITE

SECOND

WRITE

LAST

VALID

READ

tHMRP

LOW

tMRR

Master Reset (Programming Mode) Timing Diagram

MR

ENW

CKW

ENR

Q0 − 17

CKR

MR

ENW

CKW

D0 − 17

Q0 − 17

CKR

D0 − 17

ENR

PGM WORD

[20, 21]

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