CY7C109B
CY7C1009B
Switching Waveforms
(continued)
Write Cycle No. 1 (CE
1
or CE
2
Controlled)
[13, 14]
t
WC
ADDRESS
t
SCE
CE
1
t
SA
CE
2
t
SCE
t
AW
t
PWE
WE
t
SD
DATA I/O
DATA VALID
t
HD
t
HA
Write Cycle No. 2 (WE Controlled, OE HIGH During Write)
[13, 14]
t
WC
ADDRESS
t
SCE
CE
1
CE
2
t
SCE
t
AW
t
SA
WE
t
PWE
t
HA
OE
t
SD
DATA I/O
NOTE 15
t
HZOE
DATA
IN
VALID
t
HD
Notes:
13. Data I/O is high impedance if OE = V
IH
.
14. If CE
1
goes HIGH or CE
2
goes LOW simultaneously with WE going HIGH, the output remains in a high-impedance state.
15. During this period the I/Os are in the output state and input signals should not be applied.
Document #: 38-05038 Rev. *C
Page 5 of 10
CYPRESS [ CYPRESS SEMICONDUCTOR ]
