CY7C1231H
Document #: 001-00207 Rev. *B
Page 9 of 12
Switching Waveforms
Read/Write Waveforms
[18, 19, 20]
Notes:
18. For this waveform ZZ is tied LOW.
19. 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.
20. 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
tCYC
tCL
tCH
10
CE
tCEH
tCES
WE
CEN
tCENH
tCENS
BW
[A:B]
ADV/LD
tAH
tAS
ADDRESS
A1
A2
A3
A4
A5
A6
A7
tDH
tDS
DQ
COMMAND
tCLZ
D(A1)
D(A2)
Q(A4)
Q(A3)
D(A2+1)
tDOH
tCHZ
tCDV
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
tOEV
tOELZ
tOEHZ
DON’T CARE
UNDEFINED
D(A5)
tDOH
Q(A4+1)
D(A7)
Q(A6)
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