CY7C1223H

Switching Waveforms (continued)

Read/Write Timing[16, 18, 19]

tCYC

CLK

 

 

 

tCH tCL

 

 

 

 

 

 

 

 

tADS

tADH

 

 

 

 

 

 

ADSP

 

 

 

 

 

 

 

 

 

ADSC

 

 

 

 

 

 

 

 

 

 

 

tAS

tAH

 

 

 

 

 

 

ADDRESS

A1

A2

A3

A4

 

 

 

BWE, BW[A:B]

 

 

 

tWES

tWEH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tCES

tCEH

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

 

ADV

 

 

 

 

 

 

 

 

 

OE

 

 

 

 

 

 

 

 

 

 

 

 

tCO

tDS

tDH

 

 

 

 

Data In (D)

 

High-Z

 

D(A3)

tOELZ

 

 

 

 

 

 

 

 

 

 

 

 

t

tOEHZ

 

 

 

 

 

 

 

 

CLZ

 

 

 

 

 

 

Data Out (Q)

 

High-Z

Q(A1)

Q(A2)

 

Q(A4)

Q(A4+1)

Q(A4+2)

Q(A4+3)

 

 

 

 

 

 

Back-to-Back READs

Single WRITE

 

BURST READ

 

 

 

 

 

 

DON’T CARE

UNDEFINED

 

 

 

Notes:

18.The data bus (Q) remains in High-Z following a Write cycle, unless a new read access initiated by ADSC or ADSP.

19.GW is HIGH.

A5 A6

D(A5) D(A6)

Back-to-Back

WRITEs

Document #: 38-05674 Rev. *B

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Cypress CY7C1223H manual Read/Write Timing16, 18, Adsp Adsc