SWITCHING WAVEFORMS
Embedded
Program
Embedded
Program Setup
Data# Polling
PA
Read
Addresses
PA
t
t
WC
RC
t
AS
CE#
t
AH
t
GHWL
OE#
WE#
Data
t
WHWH3 OR 4
t
WP
t
CSE
t
WPH
t
DF
t
t
DH
OE
50h
D
DQ7# DQ7#
D
OUT
IN
t
VCS
t
t
OH
DS
V
CC
t
CE
V
PP
t
VPEL
18879C-20
Notes:
is data input to the device.
D
IN
DQ7# is the complement of the data written to the device.
is the data written to the device.
D
OUT
Figure 11. AC Waveforms for Embedded Programming Operation
28
Am28F256A