M29W320DT datasheet(22/56 Pages) STMICROELECTRONICS

22 / 56 page

Command Interface

M29W320DT, M29W320DB

22/56

Table 4.

Commands, 16-bit mode, BYTE = VIH

(1)(2)

Command

Bus Write Operations

1st

2nd

3rd

4th

5th

6th

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read/Reset(3)

555

2AA

Auto Select(4)

555

2AA

555

Program(5)

555

2AA

555

Unlock Bypass(6)

555

2AA

555

Unlock Bypass

Program(5)

Unlock Bypass

Reset(7)

Chip Erase(5)

555

2AA

555

2AA

555

Block Erase(5)

555

2AA

555

2AA

Erase Suspend(8)

Erase Resume(9)

Read CFI Query(10)

155

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-A20, DQ8-DQ14 and DQ15

are Don’t Care. DQ15A–1 is A–1 when BYTE is VIL or DQ15 when BYTE is VIH.

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

ignored during algorithm execution.

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

After Program, Unlock Bypass Program, Chip Erase, Block Erase 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.

After the Unlock Bypass command issue Unlock Bypass Program or Unlock Bypass Reset commands.

After the Unlock Bypass Reset command read the memory as normal until another command is issued.

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

commands on non-erasing blocks as normal.

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.

10. CFI Query command is valid when device is ready to read array data or when device is in autoselected mode.

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