Cypress Semiconductor FLEx36 CY7C0850AV Manual do Utilizador descarregar pdf (Página 21)

CY7C0850AV,CY7C0851V/CY7C0851AV

CY7C0852V/CY7C0852AV

CY7C0853V/CY7C0853AV

Document #: 38-06070 Rev. *K Page 21 of 36

Figure 14. Write with Address Counter Advance

[41]

Figure 15. Disabled to Read-to-Read to Read-to-Write

Switching Waveforms (continued)

CH2

CL2

CYC2

n+1

n+2

n+3

n+4

n+1

n+2

n+3

n+4

SAD

HAD

SCN

HCN

WRITE EXTERNAL

WRITE WITH COUNTER

ADDRESS

WRITE WITH

COUNTER

WRITE COUNTER

HOLD

CLK

ADDRESS

INTERNAL

DATA

ADDRESS

CNTEN

ADS

CD2

CLK

R/W

ADDRESS

DATA

OUT

n+1

n+2

n+3

n+4

n+1

n+2

CL2

CH2

CYC2

DISABLED

READ

WRITE

READ

READREAD

DATA

n+3

Note

41. CE

= B0 – B3 = R/W = LOW; CE

= CNTRST = MRST = CNT/MSK = HIGH. When R/W first switches low, since OE = LOW, the Write operation cannot be completed

(labelled as no operation). One clock cycle is required to three-state the I/O for the Write operation on the next rising edge of CLK.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 35 36

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Cypress Semiconductor FLEx36 CY7C0850AV Manual do Utilizador Página 21

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