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CY7C148
CY7C149
4
Switching Waveforms
Notes:
10. WE is HIGH for read cycle.
11. Device is continuously selected, CS = VIL.
12. Address valid prior to or coincident with CS transition LOW.
Read Cycle No. 1
Read Cycle No. 2
Write Cycle No. 1 (WE Controlled)
ADDRESS
50%
DATA OUT
PREVIOUS DATA VALID
DATA VALID
tRC
tAA
50%
DATA VALID
tRC
tACS
tLZ
tPU
DATA OUT
HIGH IMPEDANCE
IMPEDANCE
ICC
ISB
tHZ
tPD
CS
HIGH
tWC
DATA–IN VALID
DATA UNDEFINED
HIGH IMPEDANCE
tCW
tAW
tAS
tWP
tWA
tDH
VCC
SUPPLY
CURRENT
tWZ
tOW
tDW
CS
WE
DATA IN
DATA OUT
ADDRESS
tOH
C148–6
C148–7
C148–8
[10,11]
[10,12]
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