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CY7C008/009
CY7C018/019
Document #: 38-06041 Rev. *D
Page 9 of 19
Switching Waveforms
Notes:
22. R/W is HIGH for read cycles.
23. Device is continuously selected CE = VIL. This waveform cannot be used for semaphore reads.
24. OE = VIL.
25. Address valid prior to or coincident with CE transition LOW.
26. To access RAM, CE = VIL, SEM = VIH. To access semaphore, CE = VIH, SEM = VIL.
tRC
tAA
tOHA
DATA VALID
PREVIOUS DATA VALID
DATA OUT
ADDRESS
tOHA
Read Cycle No. 1 (Either Port Address Access)[22, 23, 24]
tACE
tLZOE
tDOE
tHZOE
tHZCE
DATA VALID
tLZCE
tPU
tPD
ISB
ICC
DATA OUT
OE
CE
CURRENT
Read Cycle No. 2 (Either Port CE/OE Access)[22, 25, 26]
DATA OUT
tRC
ADDRESS
tAA
tOHA
CE
tLZCE
tABE
tHZCE
tACE
tLZCE
Read Cycle No. 3 (Either Port)[22, 24, 25, 26]