SWITCHING WAVEFORMS
Embedded
Program
Embedded
Program Setup
Data# Polling
PA
Addresses
PA
t
WC
t
t
AS
WE#
OE#
AH
t
GHEL
t
CPH
t
EHEH3 OR 4
t
CP
CE#
Data
t
DH
t
WS
50h
D
DQ7# DQ7# D
OUT
IN
t
DS
V
CC
V
PP
t
VPEL
18879C-21
Notes:
1. D is data input to the device.
IN
2. DQ7# is complement of the data written to the device.
3. D is the data written to the device.
OUT
Figure 12. AC Waveforms for Embedded Programming Operation Using CE# Controlled Writes
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Am28F256A