CY7C135 CYPRESS [Cypress Semiconductor], CY7C135 Datasheet - Page 6

• Manufacturer Part Number: CY7C135
• Description: 4K x 8 Dual-Port Static RAM and 4K x 8 Dual-Port SRAM with Semaphores
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Waveforms
Notes:
Document #: 38-06038 Rev. *B
14. R/W is HIGH for read cycle.
15. Device is continuously selected, CE = V
16. Address valid prior to or coincident with CE transition LOW.
17. CE
Read Cycle No. 2
Read Cycle No. 1
Read Timing with Port-to-Port
SEM
DATA OUT
ADDRESS
ADDRESS
ADDRESS
DATA
DATA OUT
DATA
L
[13]
= CE
or CE
R/W
OUTL
R
INR
I
OE
I
CC
SB
=LOW; R/W
R
R
L
PREVIOUS DATA VALID
[14,16]
[14,15]
L
= HIGH
t
PU
t
OHA
t
[17]
LZCE
IL
and OE = V
t
LZOE
t
ACE
IL
.
Either Port Address Access
t
Either Port CE/OE Access
DOE
t
AA
MATCH
MATCH
t
wc
t
RC
t
PWE
t
DATA VALID
WDD
VALID
t
SD
t
DDD
t
DATA VALID
HZOE
t
HD
t
HZCE
t
PD
CY7C1342
CY7C135
Page 6 of 12
VALID
1342–11
1342–9
1342–10