PRELIMINARY
Switching Waveforms (continued)
Write Cycle No. 1 (WE Controlled)[8, 13, 14]
tWC
ADDRESS
CE
tAW
tSA
WE
t PWE
CY62256V
tHA
OE
DATA I/O
NOTE 15
t HZOE
Write Cycle No. 2 (CE Controlled) [8, 13, 14]
ADDRESS
CE
tSA
WE
DATA I/O
tSD
DATAINVALID
tWC
tAW
tSCE
tSD
DATAINVALID
Write Cycle No. 3 (WE Controlled, OE LOW)[ 9, 14]
tWC
ADDRESS
CE
tAW
tSA
WE
tHD
tHA
t HD
t HA
DATA I/O
NOTE 15
t HZWE
tSD
DATA INVALID
Notes:
13. Data I/O is high impedance if OE = VIH.
14. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
15. During this period, the I/Os are in output state and input signals should not be applied.
t HD
tLZWE
C62256V–10
C62256V–11
C62256V–12
6