Rainbow Electronics W27E520 - Manual (Page 8)

Advance Information W27E520
- 8 -
TIMING WAVEFORMS
AC Read Waveform
OE/Vpp
AD0-AD7
High Z
T OE
T OH
T DF
VIH
VIL
A8-A15
ALE
Address Valid
T CE
VIL
VIH
VIH
VIL
Address Data
T ALE
T ACC
T AS T AH
High Z
Programming Waveform
ALE
AD[7:0]
PROGRAM PROGRAM (VERIFY)
VR
POE
DFP
A[15:8]
Address Stable
Add Data out
T
ALE T
T
T
13V
V
IH
IL
V
V
IH
IL
V
V
IH
IL
V
V
IH
IL
V
OE/Vpp
T
OES OEH
VS
ALE
LAS LAH
DS
PPW
DH
Add Data in
RPT
T T
T
T
T
T
T T
AS T
T
AH T