AT29C257 查看數據表（PDF） - Atmel Corporation

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AT29C257

256K (32K 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)

Notes for software product identification:

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

Address Format: A14 - A0 (Hex).

2. A1 - A14 = 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: DC

Software Product

Identification Exit (1)

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA F0

TO

ADDRESS 5555

PAUSE 10 mS

EXIT PRODUCT

IDENTIFICATION

MODE (4)

4-114

AT29C257

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