Cypress CY7C1231H Switching Waveforms continued, NOP, STALL and Deselect Cycles18, 19, + Feedback

CY7C1231H

Switching Waveforms (continued)

NOP, STALL and Deselect Cycles[18, 19, 21]

CLK

CEN

CE

ADV/LD

WE

BW[A:B]

ADDRESS

DQ

COMMAND

1 2 3 4 5

A1 A2 A3 A4

	D(A1)		Q(A2)	Q(A3)
WRITE	READ	STALL	READ	WRITE
D(A1)	Q(A2)		Q(A3)	D(A4)

6 7 8 9 10

A5

tCHZ

D(A4) Q(A5)

			tDOH
STALL	NOP	READ	DESELECT CONTINUE
		Q(A5)	DESELECT

DON’T CARE UNDEFINED

ZZ Mode Timing[22, 23]

CLK

ZZ

ISUPPLY

ALL INPUTS (except ZZ)

Outputs (Q)

tZZ

t ZZI

I DDZZ

High-Z

DON’T CARE

t ZZREC

t RZZI

DESELECT or READ Only

Notes:

21.The IGNORE CLOCK EDGE or STALL cycle (Clock 3) illustrated CEN being used to create a pause. A write is not performed during this cycle.

22.Device must be deselected when entering ZZ mode. See Truth Table for all possible signal conditions to deselect the device.

23.I/Os are in tri-state when exiting ZZ sleep mode.

Document #: 001-00207 Rev. *B Page 10 of 12

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