AT29C1024 데이터 시트보기 (PDF) - Atmel Corporation

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AT29C1024

1-Megabit (64K x 16) 5-volt Only Flash Memory

Atmel Corporation 

Software Data Protection

Enable Algorithm(1)

LOAD DATA AAAA

TO

ADDRESS 5555

Software Data Protection

Disable Algorithm(1)

LOAD DATA AAAA

TO

ADDRESS 5555

LOAD DATA 5555

TO

ADDRESS 2AAA

LOAD DATA 5555

TO

ADDRESS 2AAA

LOAD DATA A0A0

TO

ADDRESS 5555

WRITES ENABLED

LOAD DATA 8080

TO

ADDRESS 5555

LOAD DATA

TO

ENTER DATA

SECTOR (128 WORDS)(4) PROTECT STATE(2)

Notes for software program code:

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

Address Format: A14 - A0 (Hex).

2. Write Protect state will be activated at end of write

period even if no other data is loaded.

3. Write Protect state will be deactivated at end of

write period even if no other data is loaded.

4. 128 words of data MUST BE loaded.

LOAD DATA AAAA

TO

ADDRESS 5555

LOAD DATA 5555

TO

ADDRESS 2AAA

LOAD DATA 2020

TO

ADDRESS 5555

EXIT DATA

PROTECT STATE(3)

LOAD DATA XXXX

TO

SECTOR (128 WORDS)(4)

Software Protected Program Cycle Waveform(1)(2)(3)

Note:

1. A7 through A16 must specify the same page address during each high to low transition of WE (or CE) after the software

code has been entered.

2. OE must be high when WE and CE are both low.

3. All bytes that are not loaded within the sector being programmed will be indeterminate.

8

AT29C1024

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