Cypress Semiconductor CY7C1231H Hoja de especificaciones - Página 9

Navegue en línea o descargue pdf Hoja de especificaciones para Hardware informático Cypress Semiconductor CY7C1231H. Cypress Semiconductor CY7C1231H 13 páginas. Cypress 2-mbit (128k x 18) flow-through sram with nobl architecture specification sheet

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Switching Waveforms

[18, 19, 20]
Read/Write Waveforms
1
CLK
t CENS
t CENH
CEN
t CES
t CEH
CE
ADV/LD
WE
BW
[A:B]
A1
ADDRESS
t AS
t AH
DQ
t DS
OE
COMMAND
WRITE
D(A1)
Notes:
18. For this waveform ZZ is tied LOW.
19. When CE is LOW, CE
is LOW, CE
1
20. Order of the Burst sequence is determined by the status of the MODE (0 = Linear, 1 = Interleaved). Burst operations are optional.
Document #: 001-00207 Rev. *B
2
3
4
t CYC
t CL
t CH
A2
A3
t CDV
t CLZ
D(A1)
D(A2)
D(A2+1)
t DH
WRITE
BURST
READ
D(A2)
WRITE
Q(A3)
D(A2+1)
DON'T CARE
is HIGH and CE
is LOW. When CE is HIGH, CE
2
3
5
6
7
A4
A5
t DOH
t OEV
t CHZ
Q(A3)
Q(A4)
Q(A4+1)
t OEHZ
t DOH
t OELZ
READ
BURST
WRITE
Q(A4)
READ
D(A5)
Q(A4+1)
UNDEFINED
is HIGH or CE
is LOW or CE
1
2
CY7C1231H
8
9
10
A6
A7
D(A5)
Q(A6)
D(A7)
READ
WRITE
DESELECT
Q(A6)
D(A7)
is HIGH.
3
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