29C020 Ver la hoja de datos (PDF) - Atmel Corporation

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29C020

2-Megabit (256K x 8) 5-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 10 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

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)

LOAD DATA FF

TO

ADDRESS 3FFFFH(3)

PAUSE 10 mS

EXIT PRODUCT

IDENTIFICATION

MODE(4)

Notes:

1. Data Format: I/O15 - I/O0 (Hex);

Address Format: A14 - A0 (Hex).

2. A1 - A17 = VIL.

Manufacturer 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 is 1F. The Device Code is DA.

PAUSE 20 mS

PAUSE 20 mS

Notes:

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.

12 AT29C020

0291M–FLASH–05/02

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