at49f020-90ti ATMEL Corporation, at49f020-90ti Datasheet - Page 9

• Manufacturer Part Number: at49f020-90ti
• Description: 2-megabit 256k X 8 5-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

Software Product Identification Entry
Software Product Identification Exit
Notes for software product identification:
1. Data Format: I/O7 - I/O0 (Hex);
2. A1 - A17 = V
3. The device does not remain in identification mode if
4. The device returns to standard operation mode.
5. Manufacturer Code is 1FH. The Device Code is
Address Format: A14 - A0 (Hex).
Manufacturer Code is read for A0 = V
Device Code is read for A0 = V
powered down.
0BH.
IDENTIFICATION
ADDRESS 2AAA
EXIT PRODUCT
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA F0
LOAD DATA 55
MODE
TO
TO
TO
IL
.
(4)
ENTER PRODUCT
IDENTIFICATION
ADDRESS 2AAA
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA 55
LOAD DATA 90
MODE
TO
TO
TO
OR
(2)(3)(5)
IH
IDENTIFICATION
EXIT PRODUCT
LOAD DATA F0
ANY ADDRESS
.
MODE
TO
IL
;
(4)
(1)
(1)
Boot Block Lockout
Feature Enable Algorithm
Notes for boot block lockout feature enable:
1. Data Format: I/O7 - I/O0 (Hex);
2. Boot block lockout feature enabled.
Address Format: A14 - A0 (Hex).
PAUSE 1 second
ADDRESS 2AAA
ADDRESS 2AAA
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA 55
LOAD DATA 80
LOAD DATA 55
LOAD DATA 40
TO
TO
TO
TO
TO
TO
(2)
(1)
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