Cypress Semiconductor FLEx36 CY7C0850AV Manual do Utilizador descarregar pdf (Página 18)

CY7C0850AV,CY7C0851V/CY7C0851AV

CY7C0852V/CY7C0852AV

CY7C0853V/CY7C0853AV

Document #: 38-06070 Rev. *K Page 18 of 36

Switching Waveforms

Figure 8. Master Reset

Figure 9. Read Cycle

[26, 27, 28, 29, 30]

MRST

RSR

INACTIVE

ACTIVE

TMS

TDO

INT

CNTINT

RSF

RSS

ALL

ADDRESS/

DATA

LINES

ALL

OTHER

INPUTS

CH2

CL2

CYC2

n+1

CLK

R/W

ADDRESS

DATA

OUT

n+2

n+3

OHZ

OLZ

CD2

CKLZ

n+1

n+2

1 Latency

–B3

Notes

26.

CE is internal signal. CE = LOW if CE

= LOW and CE

= HIGH. For a single Read operation, CE only needs to be asserted once at the rising edge of the CLK and

can be deasserted after that. Data is out after the following CLK edge and is three-stated after the next CLK edge.

27. OE

is asynchronously controlled; all other inputs (excluding MRST and JTAG) are synchronous to the rising clock edge.

28. ADS

= CNTEN = LOW, and MRST = CNTRST = CNT/MSK = HIGH.

29. The output is disabled (high-impedance state) by CE

= V

following the next rising edge of the clock.

30. Addresses do not have to be accessed sequentially since ADS

= CNTEN = V

with CNT/MSK = V

constantly loads the address on the rising edge of the CLK.

Numbers are for reference only.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 35 36

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Cypress Semiconductor FLEx36 CY7C0850AV Manual do Utilizador Página 18

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