EEPROM
Austin Semiconductor, Inc.
TOGGLE BIT
This device provides another function to determine the internal programming cycle. If the EEPROM is set to read mode
during the internal programming cycle, I/O6 will charge from "1" to "0" (toggling) for each read. When the internal pro-
gramming cycle is finished, toggling of I/O6 will stop and the device can be accessible for next read or program.
AS8ER128K32
TOGGLE BIT WAVEFORM
Address
CE\
t
CE3
4
Next Mode
WE\
OE\
t
OEH
I/O6
Din
Dout
1
t
OE3
t
OES
Dout
Dout
2
Dout
2
t
DW
t
WC
NOTES:
1) I/O6 beginning state is "1".
2) I/O6 ending state will vary.
3) See AC read characteristics.
4) Any locations can be used, but the address must be fixed.
SOFTWARE DATA PROTECTION TIMING WAVEFORM (In protection mode)
V
CC
CE\
WE\
Address
Data (each byte)
5555
AA
AAAA or
2AAA
55
5555
A0
* During this write cycle, data is physically written to the address provided.
AS8ER128K32
Rev. 5.3 6/05
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
9
{
Write Data
t
BLC
t
BLC
t
BLC
t
WC
Write Address*