M29F400 データシートの表示（PDF） - STMicroelectronics

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M29F400

4 Mbit (512Kb x8 or 256Kb x16, Boot Block) single supply Flash memory

STMicroelectronics 

Command interface

M29F400BT, M29F400BB

Table 5.

Commands, 8-bit mode, BYTE = VIL(1) (2)

Bus Write Operations

Command

1st

2nd

3rd

4th

5th

6th

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Read/Reset

1 X F0

3 AAA AA 555 55 X F0

Auto Select

3 AAA AA 555 55 AAA 90

Program

4 AAA AA 555 55 AAA A0 PA PD

Unlock Bypass 3 AAA AA 555 55 AAA 20

Unlock Bypass

Program

2

X

A0 PA PD

Unlock Bypass

Reset

2

X

90

X

00

Chip Erase

6 AAA AA 555 55 AAA 80 AAA AA 555 55 AAA 10

Block Erase

6+ AAA AA 555 55 AAA 80 AAA AA 555 55 BA 30

Erase Suspend 1 X B0

Erase Resume 1 X 30

1. X = Don’t Care, PA = Program Address, PD = Program Data, BA = Any address in the Block.

2. All values are in hexadecimal.

The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands;

A11-A17, DQ8-DQ14 and DQ15 are Don’t Care. DQ15A–1 is A–1 when BYTE is VIL or

DQ15 when BYTE is VIH.

4.11

Read/Reset

After a Read/Reset command, read the memory as normal until another command is

issued.

4.12

Auto Select

After an Auto Select command, read Manufacturer ID, Device ID or Block Protection Status.

4.13

Program, Unlock Bypass Program, Chip Erase, Block Erase

After these commands read the Status Register until the Program/Erase Controller

completes and the memory returns to Read Mode. Add additional Blocks during Block

Erase Command with additional Bus Write Operations until Timeout Bit is set.

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