Cypress CY7C1231H - Manual (Page 10)

CY7C1231H
Document #: 001-00207 Rev. *B Page 10 of 12
NOP, STALL and Deselect Cycles
[18, 19, 21]
ZZ Mode Timing [22, 23]
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.
Switching Waveforms (continued)
READ
Q(A3)
4 5 6 7 8 9 10
A3 A4 A5
D(A4)
1 2 3
CLK
CE
WE
CEN
BW [A:B]
ADV/LD
ADDRESS
DQ
COMMAND
WRITE
D(A4)
STALL WRITE
D(A1)
READ
Q(A2)
STALL NOP READ
Q(A5)
DESELECT CONTINUE
DESELECT
DON’T CARE UNDEFINED
tCHZ
A1 A2
Q(A2) D(A1) Q(A3)
tDOH
Q(A5)
t
ZZ
I
SUPPLY
CLK
ZZ
t
ZZREC
ALL INPUTS
(except ZZ)
DON’T CARE
I
DDZZ
t
ZZI
t
RZZI
Outputs (Q)
High-Z
DESELECT or READ Only
[+] Feedback