CY62256 Cypress Semiconductor, CY62256 Datasheet - Page 5

• Manufacturer Part Number: CY62256
• Description: 256K (32K x 8) Static RAM
• Manufacturer: Cypress Semiconductor

Document #: 38-05248 Rev. *B
Switching Waveforms
Write Cycle No. 1 (WE Controlled)
Notes:
13. Address valid prior to or coincident with CE transition LOW.
14. Data I/O is high impedance if OE = V
15. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
Read Cycle No. 2
ADDRESS
Write Cycle No. 2 (CE Controlled)
DATA OUT
ADDRESS
CURRENT
DATA I/O
DATA I/O
SUPPLY
CE
WE
V
WE
OE
CE
OE
CE
CC
[12, 13]
NOTE
HIGH IMPEDANCE
16
t
PU
(continued)
t
LZCE
t
SA
IH
t
HZOE
.
t
t
LZOE
ACE
[9, 14, 15]
[9, 14, 15]
t
SA
50%
t
DOE
t
AW
t
AW
t
RC
t
WC
t
WC
DATA
t
t
PWE
SD
DATA
t
IN
SCE
t
SD
VALID
DATA VALID
IN
VALID
t
HD
t
HA
t
HA
t
HD
t
t
HZOE
HZCE
t
PD
50%
CY62256
IMPEDANCE
Page 5 of 11
HIGH
ICC
ISB