Cypress CY7C1347G manual Switching Waveforms continued, Write Cycle Timing16, + Feedback

Models: CY7C1347G

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Switching Waveforms (continued)

CY7C1347G

Switching Waveforms (continued)

Figure 6. Write Cycle Timing[16, 17]

CLK

ADSP

ADSC

ADDRESS

BWE, BW[A :B]

GW

CE

ADV

OE

Data In (D)

 

t CYC

 

 

 

 

 

 

 

 

 

 

 

tCH

tCL

 

 

 

 

 

 

 

 

 

 

tADS

tADH

 

 

 

 

 

 

 

 

 

 

 

 

 

tADS

tADH

 

 

ADSC extends burst

 

 

 

 

 

 

 

 

 

tADS

tADH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tAS

tAH

 

 

 

 

 

 

 

 

 

 

 

 

A1

 

 

A2

 

 

 

 

A3

 

 

 

 

Byte

write signals

are

 

 

 

 

 

 

 

 

 

ignored for first cycle when

 

 

 

 

 

tWES

tWEH

 

 

ADSP initiates burst

 

 

 

 

 

 

 

 

 

 

 

tWES tWEH

 

 

 

 

 

 

 

tCES

tCEH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tADVS

tADVH

 

 

 

 

 

 

 

ADV suspends burst

 

 

 

 

 

 

 

tDS

tDH

 

 

 

 

 

 

 

 

High-Z

t

D(A1)

D(A2)

D(A2 + 1)

D(A2 + 1)

D(A2 + 2)

D(A2 + 3)

D(A3)

D(A3 + 1)

D(A3 + 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

OEHZ

 

 

 

 

 

 

 

 

 

 

 

Data Out (Q)

BURST READ

Single WRITE

BURST WRITE

Extended BURST WRITE

DON’T CARE

UNDEFINED

Note

17. Full width write can be initiated by either GW LOW, or by GW HIGH, BWE LOW, and BWx LOW.

Document #: 38-05516 Rev. *F

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Cypress CY7C1347G manual Switching Waveforms continued, Write Cycle Timing16, + Feedback