Instruction Manual

Advance Information W27E520
- 8 -
TIMING WAVEFORMS
AC Read Waveform
OE/Vpp
AD0-AD7
High Z
T
OE
TOH
T
DF
V
IH
V
IL
A8-A15
ALE
Address Valid
T
CE
V
IL
V
IH
V
IH
V
IL
Address
Data
T
ALE
T
ACC
TAS
TAH
High Z
Programming Waveform
ALE
AD[7:0]
PROGRAM PROGRAM (VERIFY)
VR
POE
DFP
A[15:8]
Address Stable
Add
Data out
T
ALET
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
AST
T
AHT