M58LT128GST datasheet(18/98 Pages) STMICROELECTRONICS

18 / 98 page

4 Command Interface

M58LT128GST, M58LT128GSB

18/98

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 4: Command Codes, Table 5: Standard Commands, Table 6: Factory Program

Command, and Appendix D: Command Interface state tables, for a summary of the Command

Interface.

Note: The security features are described in a dedicated Application Note. Please contact

STMicroelectronics for further details.

Table 4.

Command Codes

Hex Code

Command

03h

Set Configuration Register Confirm

10h

Alternative Program Setup

20h

Block Erase Setup

40h

Program Setup

50h

Clear Status Register

70h

Read Status Register

80h

Buffer Enhanced Factory Program

90h

Read Electronic Signature

98h

Read CFI Query

B0h

Program/Erase Suspend

C0h

Program Register Program

D0h

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

E8h

Buffer Program

FFh

Read Array

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