M58PR256J datasheet(20/114 Pages) STMICROELECTRONICS

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Command interface

M58PR256J, M58PR512J

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Command interface

All Bus Write operations to the memory are interpreted by the Command Interface.

Commands consist of one or more sequential Bus Write operations. An internal

Program/Erase Controller handles all timings and verifies the correct execution of the

program and erase commands. The Program/Erase Controller provides a Status Register

whose output may be read at any time to monitor the progress or the result of the operation.

The Command Interface is reset to read mode when power is first applied, when exiting from

Reset or whenever VDD is lower than VLKO. Command sequences must be followed exactly.

Any invalid combination of commands will be ignored.

Refer to Table 6: Command codes, Table 7: Standard commands, Table 8: Factory Program

command, for a summary of the Command Interface.

Table 6.

Command codes

Hex Code

Command

01h

Block Lock Confirm and EFA Block Lock Confirm

03h

Set Configuration Register Confirm

04h

Set Enhanced Configuration Register Confirm

20h

Block Erase Setup

24h

EFA Block Erase Setup

2Fh

Block Lock-Down Confirm and EFA Block Lock-Down Confirm

41h

Program Setup

44h

EFA Program Setup

50h

Clear Status Register

60h

Block Lock Setup, Block Unlock Setup, Block Lock Down Setup, Set Configuration

64h

EFA Block Lock, EFA Block Lock-Down, EFA Block Unlock

70h

Read Status Register

80h

Buffer Enhanced Factory Program

90h

Read Electronic Signature

94h

Read EFA

98h

Read CFI Query

B0h

Program/Erase Suspend

BCh

Blank Check Setup

C0h

Protection Register Program

D0h

Program/Erase Resume, Block Erase Confirm, Block Unlock Confirm or Buffer

Program Confirm, Buffer Enhanced Factory Program Confirm, Blank Check Confirm,

Unlock EFA Block Confirm, EFA Block Erase Confirm

E9h

Buffer Program

FFh

Read Array

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