M50FW016 Datasheet, PDF(19/45 Page) STMicroelectronics – 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory

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M50FW016 Datasheet, PDF (19/45 Pages) STMicroelectronics – 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory

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M50FW016

See Figure 19., Program Suspend and Resume

Flowchart, and Pseudo Code, and Figure

22., Erase Suspend and Resume Flowchart, and

Pseudo Code, for suggested flowcharts on using

the Program/Erase Suspend command.

Program/Erase Resume Command. The Pro-

gram/Erase Resume command can be used to re-

start the Program/Erase Controller after a

Program/Erase Suspend has paused it. One Bus

Write cycle is required to issue the Program/Erase

Resume command. Once the command is issued

subsequent Bus Read operations read the Status

Table 9. Read Electronic Signature

Code

Address

Manufacturer Code

00000h

Device Code

00001h

Data

20h

2Eh

Table 10. 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

(A/A Mux Mode)

30h A1

A2 PD A3 PD A4 PD

Quadruple Byte Program

(FWH Mode)

30h Aqbp PDqbp

Chip Erase

80h

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 Donât 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, Program. After these commands read the Status Register until the command completes and another command is is-

sued.

Quadruple Byte Program (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, the user should repeatedly read the Status Register until the command has completed, at which

point another command can be issued.

Quadruple Byte Program (FWH Mode). Aqbp is the start address, A1 and A0 are treated as Donât Care. The first data byte is pro-

grammed at the address that has A1-A0 at 00, the second at the address that has A1-A0 at 01, the third at the address that has A1-

A0 at 10, and the fourth at the address that has A1-A0 at 11. After this command, the user should repeatedly read the Status Register

until the command has completed, at which point another command can be 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 â0â.

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

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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