M28W320BB datasheet(13/43 Pages) STMICROELECTRONICS

13 / 43 page

13/43

M28W320BT, M28W320BB

Table 3. Commands

Note: 1. X = Don't Care.

2. A0=VIL outputs Manufacturer code, A0=VIH outputs Device code. Address A7-A1 must be VIL.

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

Table 4. Read Electronic Signature

Note:

RP =VIH.

Table 5. Memory Blocks Protection Truth Table

Note: 1. X = Don't Care

2. VPP must also be greater than the Program Voltage Lock Out VPPLK.

Commands

No. of

Cycles

Bus Write Operations

1st Cycle

2nd Cycle

3nd Cycle

Bus

Op.

Addr

Data

Bus

Op.

Addr

Data

Bus

Op.

Addr

Data

Read Memory Array

Write

FFh

Read

Addr

Data

Read Status Register

Write

70h

Read

Status

Read Electronic Signature

Write

90h

Read

Signature

Addr

(2)

Signature

Read CFI Query

Write

98h

Read

CFI Addr

Query

Erase

Write

20h

Write

Block

Addr

D0h

Program

Write

40h or

10h

Write

Addr

Data

Input

Double Word Program(3)

Write

30h

Write

Addr 1

Data

Input

Write

Addr 2

Data

Input

Clear Status Register

Write

50h

Program/Erase Suspend

Write

B0h

Program/Erase Resume

Write

D0h

Code

Device

A1-A7

A8-A20

DQ0-DQ7

DQ8-DQ15

Manufacture.

Code

VIL

VIH

VIL

Don't Care

20h

00h

Device Code

M28W320CT

VIL

VIH

VIL

Don't Care

BCh

88h

M28W320CB

VIL

VIH

VIL

Don't Care

BDh

88h

VPP

(1)

WP (1)

Lockable Blocks

(blocks #0 and #1)

Other Blocks

VIL

Protected

VIL

VIH

Protected

VDD or VPPH

(2)

VIH

VIL

Protected

Unprotected

VDD or VPPH

(2)

VIH

Unprotected

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