PRELIMINARY
Switching Waveforms (continued)
Read Cycle No. 2 (OE Controlled) [11, 12]
ADDRESS
CE1
CE2
OE
DATA OUT
VCC
SUPPLY
CURRENT
tRC
tACE
tDOE
tLZOE
HIGH IMPEDANCE
tLZCE
tPU
50%
CY7C1512
DATA VALID
tHZOE
tHZCE
HIGH
IMPEDANCE
tPD
50%
ICC
ISB
1512-6
Write Cycle No. 1 (CE1 or CE2 Controlled) [13, 14]
tWC
ADDRESS
CE1
CE2
WE
tSA
tAW
DATA I/O
tSCE
tSCE
tSD
DATA VALID
tHA
tHD
Notes:
12. Address valid prior to or coincident with CE1 transition LOW and CE2 transition HIGH.
13. Data I/O is high impedance if OE = VIH.
14. If CE1 goes HIGH or CE2 goes LOW simultaneously with WE going HIGH, the output remains in a high-impedance state.
1512-7
5