Software Product
Boot Block Lockout
Identification Entry (1)
Feature Enable Algorithm (1)
LOAD DATA AA
TO
LOAD DATA AA
TO
ADDRESS 5555
ADDRESS 5555
LOAD DATA 55
TO
LOAD DATA 55
TO
ADDRESS 2AAA
ADDRESS 2AAA
LOAD DATA 90
TO
LOAD DATA 80
TO
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
PAUSE 10 mS
ENTER PRODUCT
IDENTIFICATION
(2, 3, 5)
MODE
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 40
TO
ADDRESS 5555
Software Product
Identification Exit (1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 00
TO
LOAD DATA FF
TO
ADDRESS 00000H (2)
ADDRESS FFFFFH (3)
LOAD DATA 55
TO
ADDRESS 2AAA
PAUSE 10 mS
PAUSE 10 mS
LOAD DATA F0
TO
ADDRESS 5555
Notes for boot block lockout feature enable:
1. Data Format: I/O7 - I/O0 (Hex);
PAUSE 10 mS
Address Format: A14 - A0 (Hex).
2. Lockout feature set on lower address boot block.
3. Lockout feature set on higher address boot block.
EXIT PRODUCT
IDENTIFICATION
MODE
(4)
Notes for software product identification:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. A1 - A17 = VIL.
Manufacture Code is read for A0 = VIL;
Device Code is read for A0 = VIH.
3. The device does not remain in identification mode if
powered down.
4. The device returns to standard operation mode.
5. Manufacturer Code: 1F
Device Code: DA
10
AT29C020
ATMEL [ ATMEL ]
