CY7C144AV CYPRESS [Cypress Semiconductor], CY7C144AV Datasheet - Page 11

• Manufacturer Part Number: CY7C144AV
• Description: 3.3V 8K/16K x 8 Dual-Port Static RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Waveforms
Document #: 38-06051 Rev. *E
CURRENT
Notes
DATA OUT
ADDRESS
19. R/W is HIGH for read cycles.
20. Device is continuously selected CE = V
21. OE = V
22. Address valid prior to or coincident with CE transition LOW.
23. To access RAM, CE = V
DATA OUT
ADDRESS
DATA OUT
IL
CE
I
OE
I
.
CE
CC
SB
PREVIOUS DATA VALID
IL
, SEM = V
Figure 1. Read Cycle No. 1 Either Port Address Access
t
Figure 2. Read Cycle No. 2 Either Port CE/OE Access
OHA
IH
. To access semaphore, CE = V
IL
Figure 3. Read Cycle No. 3 Either Port
. This waveform cannot be used for semaphore reads.
t
AA
t
PU
t
AA
t
t
LZCE
LZCE
t
LZCE
t
t
ACE
ABE
t
LZOE
t
t
RC
ACE
t
RC
IH
t
DOE
, SEM = V
IL
.
[19, 21, 22, 23]
DATA VALID
[19, 22, 23]
[19, 20, 21]
DATA VALID
t
OHA
t
t
t
OHA
HZCE
PD
t
t
HZCE
HZOE
CY7C144AV
CY7C006AV
Page 11 of 21
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