CY7C1351
Switching Waveforms
Read/Write/Deselect Sequence
CLK
t
t
CENH
t
t
CENH
CENS
CENS
t
t
CL
t
CYC
CH
CEN
t
AS
WA2
AH
WA5
RA1
RA3
RA4
RA6
RA7
ADDRESS
t
WE
t
t
WS
WH
t
CES
t
CEH
CE
t
DOH
t
CHZ
t
DOH
t
t
CLZ
CHZ
Q6
Out
Q4
Out
D5
In
Data-
In/Out
D2
In
Q7
Out
Q3
Out
Q1
Out
Device
t
originally
CDV
deselected
WE is the combination of WE & BWS to define a write cycle (see Write Cycle Description table).
x
CE is the combination of CE , CE , and CE . All chip selects need to be active in order to select
1
2
3
the device. Any chip select can deselect the device. RAx stands for Read Address X, WAx stands for
Write Address X, Dx stands for Data-in X, Qx stands for Data-out X.
= UNDEFINED
= DON’T CARE
10
CYPRESS [ CYPRESS ]
