Cypress CY7C1231H - Manual (Page 9)

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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