CY7C1339G

Switching Waveforms (continued)

Read/Write Cycle Timing[18, 20, 21]

 

 

 

tCYC

 

 

 

 

 

 

CLK

 

 

 

 

 

 

 

 

 

 

 

tCH

tCL

 

 

 

 

 

 

 

tADS

tADH

 

 

 

 

 

 

 

ADSP

 

 

 

 

 

 

 

 

 

ADSC

 

 

 

 

 

 

 

 

 

 

tAS

tAH

 

 

 

 

 

 

 

ADDRESS

A1

A2

 

A3

A4

 

 

 

 

BWE,

 

 

 

tWES

tWEH

 

 

 

 

 

 

 

 

 

 

 

 

 

BW[A:D]

 

 

 

 

 

 

 

 

 

 

tCES

tCEH

 

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

 

ADV

 

 

 

 

 

 

 

 

 

OE

 

 

 

 

 

 

 

 

 

 

 

 

tCO

tDS tDH

 

 

 

 

Data In (D)

 

 

 

 

tOELZ

 

 

 

 

High-Z

 

 

D(A3)

 

 

 

 

 

 

 

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:

20.The data bus (Q) remains in high-Z following a WRITE cycle, unless a new read access is initiated by ADSP or ADSC.

21.GW is HIGH.

A5 A6

D(A5) D(A6)

Back-to-Back

WRITEs

Document #: 38-05520 Rev. *F

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Cypress CY7C1339G manual Read/Write Cycle Timing18, 20