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M28W320FSU, M28W640FSU

Table 4. Commands

Note: 1. X = Don't Care, RA=Read Address, RD=Read Data, SRD=Status Register Data, ID=Identifier (Manufacture and Device Code),

QA=Query Address, QD=Query Data, BA=Block Address, PA=Program Address, PD=Program Data, PRA=Protection Register Ad-

dress, PRD=Protection Register Data.

2. The signature addresses are listed in Tables 5 and 6.

3. Program Addresses 1 and 2 must be consecutive Addresses differing only for A0.

4. Program Addresses 1,2,3 and 4 must be consecutive Addresses differing only for A0 and A1.

Table 5. Read Electronic Signature

2. Addresses range from A0 to A20 for the M28W320FSU and from A0 to A21 for the M28W640FSU.

Commands

Bus Write Operations

1st Cycle

2nd Cycle

3rd Cycle

4th Cycle

5th Cycle

Op. Add

Data

Op. Add

Data

Op.

Add Data

Op.

Add Data

Op. Add Data

Read Memory

Array

1+ Write

X

FFh

Read

RA

RD

Read Status

Register

1+ Write

X

70h

Read

X

SRD

Read Electronic

Signature

1+ Write

X

90h

IDh

Read CFI Query

1+ Write

X

98h

Read

QA

QD

Erase

2

WriteX

20hWrite

BA

D0h

Program

2

Write

X

40h or

10h

Write

PA

PD

Double Word

3

Write

X

30h

Write

PA1

PD1

Write

PA2

PD2

Quadruple Word

5

Write

X

56h

Write

PA1

PD1

Write

PA2

PD2

Write

PA3

PD3 Write

PA4

PD4

Clear Status

Register

1Write

X

50h

Program/Erase

Suspend

1Write

X

B0h

Program/Erase

Resume

1Write

X

D0h

Protection

Register Program

2Write

X

C0h

Write

PRA

PRD

Code

Device

E

G

W

A0

A1

A2-A7

A8-A20

DQ0-DQ7

DQ8-DQ15

Manufacture

Code

0

Don't Care

20h

00h

Device Code

M28W320FSU

0

Don't Care

0Ch

88h

M28W640FSU

0

Don't Care

57h

88h