M50FW002 データシートの表示（PDF） - STMicroelectronics

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M50FW002

2 Mbit (256Kb x8, Boot Block) 3V Supply Firmware Hub Flash Memory

STMicroelectronics 

M50FW002

Table 8. Commands

Bus Write Operations

Command

1st

2nd

3rd

4th

5th

Addr Data Addr Data Addr Data Addr Data Addr Data

Read Memory Array

1 X FFh

Read Status Register

1 X 70h

Read Electronic Signature

1 X 90h

1 X 98h

Program

2 X 40h PA PD

2 X 10h PA PD

Quadruple Byte Program

5 X 30h A1 PD A2 PD A3 PD A4 PD

Chip Erase

2 X 80h X 10h

Block Erase

2 X 20h BA D0h

Clear Status Register

1 X 50h

Program/Erase Suspend

1 X B0h

Program/Erase Resume

1 X D0h

1 X 00h

1 X 01h

Invalid/Reserved

1 X 60h

1 X 2Fh

1 X C0h

Note: X Don’t Care, PA Program Address, PD Program Data, A1,2,3,4 Consecutive Addresses, BA Any address in the Block.

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

Read Status Register: After a Read Status Register command, read the Status Register as normal until another command is issued.

Read Electronic Signature: After a Read Electronic Signature command, read Manufacturer Code, Device Code until another com-

mand is issued.

Block Erase, Byte Program: After these commands, read the Status Register until the command completes and another command

is issued.

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 A1. After this command read the Status Register until the command completes and another com-

mand is issued.

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.

Clear Status Register: After the Clear Status Register command bits 1, 3, 4 and 5 in the Status Register are reset to ‘0’.

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.

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.

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

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