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