Switching Waveforms (continued)
Write Cycle No. 1 (WE Controlled)[10, 15, 16]
tWC
ADDRESS
CE
tAW
tHA
tSA
WE
tPWE
OE
DATA I/O
tHZOE
Write Cycle No. 2 (CE Controlled)[10, 15, 16]
ADDRESS
CE
tSA
tSD
DATAIN VALID
tWC
tAW
tSCE
WE
DATA I/O
Write Cycle No. 3 (WE Controlled OE LOW)[11, 16]
ADDRESS
tSD
DATA IN VALID
tWC
CE
tAW
tSA
WE
tSD
DATA I/O
DATAIN VALID
tHZWE
Notes:
15. Data I/O is high impedance if OE = VIH.
16. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
tHD
tHA
tHD
tHA
tHD
tLZWE
CY7C199
Document #: 38-05160 Rev. *A
Page 6 of 13