19/45

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

Register.

Table 9. Read Electronic Signature

Table 10. Commands

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.

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.

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 ‘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.

Code

Address

Data

Manufacturer Code

00000h

20h

Device Code

00001h

2Eh

Command

Bus Write Operations

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

1X

90h

1X

98h

Program

2X

40h

PA

PD

2X

10h

PA

PD

Quadruple Byte Program

(A/A Mux Mode)

5X

30h

PD

PD

PD

PD

Quadruple Byte Program

(FWH Mode)

2X

30h

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

Invalid/Reserved

1X

00h

1X

01h

1X

60h

1X

2Fh

1X

C0h