CY7C024-25JI CYPRESS [Cypress Semiconductor], CY7C024-25JI Datasheet - Page 9

• Manufacturer Part Number: CY7C024-25JI
• Description: 4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Waveforms
Document #: 38-06035 Rev. *B
Read Cycle No. 3 (Either Port)
Read Cycle No. 2 (Either Port CE/OE Access)
Read Cycle No. 1 (Either Port Address Access)
CURRENT
Notes:
DATA OUT
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
ADDRESS
DATA OUT
ADDRESS
DATA OUT
UB or LB
LB or UB
CE and
CE
IL
I
OE
I
CC
SB
.
PREVIOUS DATA VALID
IL
, UB or LB = V
t
OHA
[19, 21, 22, 22, 23]
IL
IL
t
AA
and UB or LB = V
, SEM = V
t
PU
t
AA
t
t
LZCE
LZCE
IH
t
LZCE
. To access semaphore, CE = V
[19, 22, 23]
t
t
ACE
ABE
[19, 20, 21]
IL
t
LZOE
. This waveform cannot be used for semaphore reads.
t
t
RC
ACE
t
RC
t
DOE
IH
, SEM = V
DATA VALID
IL
.
DATA VALID
t
OHA
t
t
t
OHA
HZCE
PD
CY7C024/0241
CY7C025/0251
t
t
t
HZOE
HZCE
HZCE
Page 9 of 20
7C024–16
7C024–15
7C024–14