CY7C1470V33
CY7C1472V33
CY7C1474V33
Document #: 38-05289 Rev. *I
Page 21 of 29
Switching Waveforms
Read/Write/Timing
[22, 23, 24]
Notes:
22. For this waveform ZZ is tied LOW.
23. When CE is LOW, CE
1
is LOW, CE
2
is HIGH and CE
3
is LOW. When CE is HIGH, CE
1
is HIGH or CE
2
is LOW or CE
3
is HIGH.
24. Order of the Burst sequence is determined by the status of the MODE (0 = Linear, 1= Interleaved). Burst operations are optional.
WRITE
D(A1)
1
2
3
4
5
6
7
8
9
CLK
t CYC
t
CL
t
CH
10
CE
t
CEH
t
CES
WE
CEN
t
CENH
t
CENS
BW
x
ADV/LD
t
AH
t
AS
ADDRESS
A1
A2
A3
A4
A5
A6
A7
t
DH
t
DS
Data
In-Out (DQ)
t
CLZ
D(A1)
D(A2)
D(A5)
Q(A4)
Q(A3)
D(A2+1)
t
DOH
t
CHZ
t
CO
WRITE
D(A2)
BURST
WRITE
D(A2+1)
READ
Q(A3)
READ
Q(A4)
BURST
READ
Q(A4+1)
WRITE
D(A5)
READ
Q(A6)
WRITE
D(A7)
DESELECT
OE
t
OEV
t
OELZ
t
OEHZ
t
DOH
DON’T CARE
UNDEFINED
Q(A6)
Q(A4+1)
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