M50FW040 datasheet(25/53 Pages) STMICROELECTRONICS

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M50FW040

Command interface

25/53

Table 7.

Commands(1)

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

Command

Bus Write operations

1st

2nd

Address

Data

Address

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)

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

another command is issued.

40h

10h

Erase(5)

20h

D0h

Clear Status Register(6)

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(7)

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(8)

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(9)

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

00h

01h

60h

2Fh

C0h

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