M58BW16F datasheet(34/81 Pages) STMICROELECTRONICS

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Command interface

M58BW16F, M58BW32F

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4.7

Erase All Main Blocks command

The Erase All Main Blocks command is used to erase all 63 Main Blocks, without affecting

the Parameter Blocks.

Issuing the Erase All Main Blocks command sets every bit in each Main Block to '1'. All data

previously stored in the Main Blocks are lost.

Two Bus Write cycles are required to issue the Erase All Main Blocks command. The first

cycle sets up the command, the second cycle confirms the command and starts the

Program/Erase Controller. If the Confirm Command is not given the sequence is aborted,

and Status Register bits 4 and 5 are set to '1'.

If the address given in the second cycle is located in a protected block, the Erase All Main

Blocks operation aborts. The data remains unchanged in all blocks and the Status Register

outputs the error.

Once the Erase All Main Blocks command has been issued, subsequent Bus Read

operations output the Status Register. See the Status Register section for details.

During an Erase All Main Blocks operation, only the Read Status Register command is

accepted by the memory; any other command are ignored. Erase All Main Blocks, once

started, cannot be suspended.

If PEN is at VIH, the operation will be performed. If PEN is lower than VIH the operation

aborts and the Status Register PEN bit (bit 3) is set to '1'.

4.8

Program command

The Program command is used to program the memory array. Two Bus Write operations are

required to issue the command; the first write cycle sets up the Program command, the

second write cycle latches the address and data to be programmed and starts the

Program/Erase Controller. A program operation can be aborted by writing FFFFFFFFh to

any address after the program set-up command has been given.

The Program command is also used to program the OTP block. Refer to Table 10:

Commands, for details of the address.

Once the command is issued subsequent Bus Read operations read the Status Register.

See the section on the Status Register for details on the definitions of the Status Register

bits. During the Program operation the memory will only accept the Read Status Register

command and the Program/Erase Suspend command. All other commands will be ignored.

If Reset/Power-down, RP, falls to VIL during programming the operation will be aborted.

If PEN is at VIH, the operation can be performed. If PEN goes below VIH, the operation

aborts, the PEN Status bit in the Status Register is set to ‘1’ and the command must be re-

issued.

See Appendix A, Figure 24: Program flowchart and pseudo code, for a suggested flowchart

on using the Program command.

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