CY7C138 CYPRESS [Cypress Semiconductor], CY7C138 Datasheet - Page 11
CY7C138
Manufacturer Part Number
CY7C138
Description
4K x 8/9 Dual-Port Static RAM
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet
1.CY7C138.pdf
(15 pages)
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Switching Waveforms
Notes:
30. t
31. t
Interrupt Timing Diagrams
Left Side Sets INT
Right Side Clears INT
Right Side Sets INT
Left Side Clears INT
ADDRESS
ADDRESS
ADDRESS
ADDRESS
HA
INS
depends on which enable pin (CE
or t
R/W
INR
R/W
R/W
R/W
INT
INT
OE
CE
INT
OE
INT
CE
CE
CE
depends on which enable pin (CE
R
R
R
L
L
L
L
R
R
R
R
R
R
R
L
L
L
L
R
:
L
L
:
R
:
:
(continued)
L
or R/W
t
INS
t
L
INS
L
or R/W
[31]
) is deasserted first.
[31]
WRITE FFE
WRITE FFF
L
) is asserted last.
t
INR
t
WC
[31]
t
WC
t
INR
t
t
[31]
HA
HA
[30]
[30]
11
READ FFE
READ FFF
t
t
RC
RC
CY7C138
CY7C139
C138-21
C138-22
C138-23
C138-24