EEPROM
AS8E128K32
Software Data Protection Disable
Algorithm(1)
Software Data Protection Enable
Algorithm(1)
Load Data >AA
Address >5555
Load Data AA
to
Address 5555
Load Data >55
Load Data 55
to
Address >2AAA
Address 2AAA
Load Data >80
Address >5555
Load Data A0
to
Writes Enabled(2)
Address 5555
Load Data >AA
Address >5555
Load Data XX
to
Load Data >55
Address >2AAA
Any Address(4)
Load Last
Load Data >20
Address >5555
Byte
Enter Data
Protect State
to
Load Data XX
;Exit Data Protect State(3)
Any Address (4)
NOTES:
1. Byte Data Format: I/O7 - I/O0, I/
Address Format: A14 - A0 (Hex)
2. Write Protect state will be active at end of write even if no other
data is loaded.
3. Write Protect state will be deactivated at end of period even if no
other data is loaded.
Load Last Byte(s)
Load Last Byte(s)
Last Address
4. 1 to 128 bytes of data are loaded.
SOFTWARE PROTECTED PROGRAM CYCLE WAVEFORM(1)(2)(3)
OE\
CE\
t
t
WPH
BLC
t
WP
WE\
t
AS
t
AH
A0-A6
A7-A16
BYTE ADDRESS
5555
2AAA
5555
PAGE ADDRESS
t
t
DS
DH
DATA
AA
A0
55
BYTE 0
BYTE 126
BYTE 127
t
WC
1. A0-A14 of the selected I/O bytes must conform to the addressing sequence for the first three bytes as shown above.
2. After the command sequence has been issued and a page write operation follows, the page address inputs (A7-A16) of the selected I/O bytes must be the same for each high to low transition
of WE\ (or CE\).
3. OE Must be high only when WE\ and CE\ are both low.
Micross Components reserves the right to change products or specifications without notice.
AS8E128K32
Rev. 8.1 01/10
8
MICROSS [ MICROSS COMPONENTS ]
