CY7C199

Document #: 38-05160 Rev. ** Page 7 of 16

Read Cycle No. 2 [13, 14]
Write Cycle No. 1 (WE Controlled)[10, 15, 16]
Write Cycle No. 2 (CE Controlled)[10, 15, 16]
Notes:
14. Address valid prior to or coincident with CE transition LOW.
15. Data I/O is high impedance if OE = VIH.
16. If CE goes HIGH simultaneously with WE HIGH, the output remai ns in a high -impedance stat e.
Switching Waveforms (continued)
50%
50%
DATA VALID
tRC
tACE
tDOE
tLZOE
tLZCE
tPU
DATA OUT HIGH IMPEDANCE IMPEDANCE
ICC
ISB
tHZOE
tHZCE
tPD
OE
CE
HIGH
VCC
SUPPLY
CURRENT
C199–9
tHD
tSD
tPWE
tSA
tHA
tAW
tWC
DATA I/O
ADDRESS
CE
WE
OE
tHZOE C199–10
DATAINVALID
tWC
tAW
tSA
tHA
tHD
tSD
tSCE
WE
DATA I/O
ADDRESS
CE
C199–11
DATAIN VAL ID