M29F800AB データシートの表示（PDF） - STMicroelectronics

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M29F800AB

8 Mbit (1Mb x8 or 512Kb x16, Boot Block) Single Supply Flash Memory

STMicroelectronics 

M29F800AT, M29F800AB

Table 7. Commands, 16-bit mode, BYTE = VIH

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

3 555 AA 2AA 55 X F0

Auto Select

3 555 AA 2AA 55 555 90

Program

4 555 AA 2AA 55 555 A0 PA PD

Chip Erase

6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10

Block Erase

6+ 555 AA 2AA 55 555 80 555 AA 2AA 55 BA 30

Erase Suspend

1 X B0

Erase Resume

1 X 30

Table 8. Commands, 8-bit mode, BYTE = VIL

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

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

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

All values in the table are in hexadecimal.

The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A18, DQ8-DQ14 and DQ15 are Don’t Care.

DQ15A–1 is A–1 when BYTE is VIL or DQ15 when BYTE is VIH.

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

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

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 the Timeout

Bit is set.

Erase Suspend. After the Erase Suspend command read non-erasing memory blocks as normal, issue Auto Select and Program commands

on non-erasing blocks as normal.

Erase Resume. After the Erase Resume command the suspended Erase operation resumes, read the Status Register until the Program/

Erase Controller completes and the memory returns to Read Mode.

Note that the Program command cannot change a

bit set at ’0’ back to ’1’. One of the Erase Com-

mands must be used to set all the bits in a block or

in the whole memory from ’0’ to ’1’.

Chip Erase Command. The Chip Erase com-

mand can be used to erase the entire chip. Six Bus

Write operations are required to issue the Chip

Erase Command and start the Program/Erase

Controller.

If any blocks are protected then these are ignored

and all the other blocks are erased. If all of the

blocks are protected the Chip Erase operation ap-

pears to start but will terminate within about 100µs,

leaving the data unchanged. No error condition is

given when protected blocks are ignored.

During the erase operation the memory will ignore

all commands. It is not possible to issue any com-

mand to abort the operation. Typical chip erase

times are given in Table 9. All Bus Read opera-

tions during the Chip Erase operation will output

the Status Register on the Data Inputs/Outputs.

See the section on the Status Register for more

details.

After the Chip Erase operation has completed the

memory will return to the Read Mode, unless an

error has occurred. When an error occurs the

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