Switching waveforms – Cypress CY7C1332AV25 User Manual
Page 16
PRELIMINARY
CY7C1330AV25
CY7C1332AV25
Document No: 001-07844 Rev. *A
Page 16 of 19
Switching Waveforms
READ/WRITE/DESELECT Sequence (OE Controlled)
[23, 24, 25, 26]
Notes:
23. The combination of WE and BWS
x
(x = a, b, c, d for x36 and x = a, b for x18) define a write cycle (see Write Cycle Description table).
24. All chip enables need to be active in order to select the device. Any chip enable can deselect the device.
25. RAx stands for Read Address X, WAx Write Address X, Dx stands for Data-in for location X, Qx stands for Data-out for location X.
26. CE held LOW.
K
ADDRESS
WE
Data
In/Out
t
CYC
t
CH
t
CL
RA1
t
AH
t
AS
t
WES
t
WEH
t
CO
Q1
= DON’T CARE
= UNDEFINED
Out
D2
In
READ
WRI
T
E
READ
DESEL
ECT
WRI
T
E
RE
AD
RE
AD
WRI
T
E
WRI
T
E
DES
E
LE
C
T
WA2
WA5
RA6
t
CLZ
t
DOH
Q3
Out
t
CHZ
Device
originally
deselected
D7
In
t
DOH
Q6
Out
t
DS
t
DH
RA3
D5
In
WA7
WA8
D8
In
OE/
t
EOHZ
t
EOLZ
t
EOV
t
EOHZ
t
DS
t
DH
BWS
x
t
WES
t
WEH
DE
SEL
ECT