M28R400CT datasheet(13/50 Pages) STMICROELECTRONICS

13 / 50 page

13/50

M28R400CT, M28R400CB

Table 3. Commands

Note: 1. X = Don’t Care.

2. The signature addresses are listed in Tables 4, 5 and 6.

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

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

55h

98h

Read

CFI Addr

Query

Block Erase

Write

20h

Write

Block

Addr

D0h

Chip Erase

Write

80h

Write

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

Block Lock

Write

60h

Write

Block

Address

01h

Block Unlock

Write

60h

Write

Block

Address

D0h

Block Lock-Down

Write

60h

Write

Block

Address

2Fh

Protection Register

Program

Write

C0h

Write

Address

Data

Input

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