M50FW080 datasheet(27/56 Pages) STMICROELECTRONICS

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M50FW080

Command interface

27/55

Table 9.

Commands(1)

X Don’t Care, PA Program Address, PD Program Data, A1,2,3,4 Consecutive Addresses, BA Any address

in the Block.

Command

Bus Write operations

1st

2nd

3rd

4th

5th

Addr Data Addr Data Addr Data Addr Data Addr Data

Read Memory Array(2)

Read Memory Array. After a Read Memory Array command, read the memory as normal until another

command is issued.

FFh

Read Status Register(3)

Read Status Register. After a Read Status Register command, read the Status Register as normal until

another command is issued.

70h

Read Electronic

Signature(4)

Read Electronic Signature. After a Read Electronic Signature command, read Manufacturer Code,

Device Code until another command is issued.

90h

98h

Program(5)

Block Erase, Program. After these commands read the Status Register until the command completes

and another command is issued.

40h

10h

Quadruple Byte Program(6)

Quadruple Byte Program. This command is only valid in A/A Mux mode. Addresses A1, A2, A3 and A4

must be consecutive addresses differing only for address bit A0 and A10. After this command read the

Status Register until the command completes and another command is issued.

30h

Chip Erase (7)

Chip Erase. This command is only valid in A/A Mux mode. After this command read the Status Register

until the command completes and another command is issued.

80h

10h

Block Erase(5)

20h

D0h

Clear Status Register(8)

Clear Status Register. After the Clear Status Register command bits 1, 3, 4 and 5 in the Status Register

are reset to ‘0’.

50h

Program/Erase Suspend(9)

Program/Erase Suspend. After the Program/Erase Suspend command has been accepted, issue Read

Memory Array, Read Status Register, Program (during Erase suspend) and Program/Erase resume

commands.

B0h

Program/Erase Resume(10)

10. Program/Erase Resume. After the Program/Erase Resume command the suspended Program/Erase

operation resumes, read the Status Register until the Program/Erase Controller completes and the

memory returns to Read Mode.

D0h

Invalid/Reserved(11)

11. Invalid/Reserved. Do not use Invalid or Reserved commands.

00h

01h

60h

2Fh

C0h

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