AT29LV020_ Ver la hoja de datos (PDF) - Atmel Corporation

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AT29LV020_

2 Megabit (256K x 8) 3-volt Only CMOS Flash Memory

Atmel Corporation 

Software Product

Identification Entry (1)

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA 90

TO

ADDRESS 5555

PAUSE 20 mS

ENTER PRODUCT

IDENTIFICATION

MODE (2, 3, 5)

Software Product

Identification Exit (1)

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA F0

TO

ADDRESS 5555

PAUSE 20 mS

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: BA

AT29LV020

Boot Block Lockout

Feature Enable Algorithm (1)

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 40

TO

ADDRESS 5555

LOAD DATA 00

TO

ADDRESS 00000H (2)

PAUSE 20 mS

LOAD DATA FF

TO

ADDRESS FFFFFH (3)

PAUSE 20 mS

Notes for boot block lockout feature enable:

1. Data Format: I/O7 - I/O0 (Hex);

Address Format: A14 - A0 (Hex).

2. Lockout feature set on lower address boot block.

3. Lockout feature set on higher address boot block.

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