Software Data
(1)
Protection Enable Algorithm
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
LOAD DATA
TO
(4)
SECTOR (128 BYTES)
Software Data
(1)
Protection Disable Algorithm
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 80
TO
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 20
TO
ADDRESS 5555
LOAD DATA
TO
(4)
SECTOR (128 BYTES)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(2)
Notes for software program code:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Data Protect state will be activated at end of program cycle.
3. Data Protect state will be deactivated at end of
program period.
4. 128-bytes of data
MUST BE
loaded.
EXIT DATA
PROTECT STATE
(3)
Software Protected Program Cycle Waveform
(1, 2, 3)
Notes: 1. A7 through A16 must specify the sector address
during each high to low transition of WE (or CE)
after the software code has been entered.
2. OE must be high when WE and CE are both low.
3.
All bytes that are not loaded within the sector being
programmed will be indeterminate.
4-136
AT29C010A
ATMEL [ ATMEL CORPORATION ]
