ST10F272M datasheet(30/175 Pages) STMICROELECTRONICS

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Internal Flash memory

ST10F272M

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SUSP

Suspend

This bit must be set to suspend the current Program (Word or Double Word) or Sector

Erase operation in order to read data in one of the Sectors of the Bank under

modification or to program data in another Bank. The Suspend operation resets the

Flash Bank to normal read mode (automatically resetting bit BSY0). When in Program

Suspend, the Flash module accepts only the following operations: Read and Program

Resume. When in Erase Suspend the module accepts only the following operations:

Read, Erase Resume and Program (Word or Double Word; Program operations cannot

be suspended during Erase Suspend). To resume a suspended operation, the WMS bit

must be set again, together with the selection bit corresponding to the operation to

resume (WPG, DWPG, SER).

Note: It is forbidden to start a new Write operation with bit SUSP already set.

WPG

Word Program

This bit must be set to select the Word (32 bits) Program operation in the Flash module.

The Word Program operation can be used to program 0s in place of 1s. The Flash

Address to be programmed must be written in the FARH/L registers, while the Flash

Data to be programmed must be written in the FDR0H/L registers before starting the

execution by setting bit WMS. WPG bit is automatically reset at the end of the Word

Program operation.

12 DWPG

Double Word Program

This bit must be set to select the Double Word (64 bits) Program operation in the Flash

module. The Double Word Program operation can be used to program 0s in place of 1s.

The Flash Address in which to program (aligned with even words) must be written in the

FARH/L registers, while the two Flash Data words to be programmed must be written in

the FDR0H/L registers (even word) and FDR1H/L registers (odd word) before starting

the execution by setting bit WMS. DWPG bit is automatically reset at the end of the

Double Word Program operation.

SER

Sector Erase

This bit must be set to select the Sector Erase operation in the Flash modules. The

Sector Erase operation can be used to erase all the Flash locations to value 0xFF. From

1 to all the sectors of the same Bank (excluded Test-Flash for Bank B0) can be selected

to be erased through bits BxFy of FCR1H/L registers before starting the execution by

setting bit WMS. It is not necessary to preprogram the sectors to 0x00, because this is

done automatically. SER bit is automatically reset at the end of the Sector Erase

operation.

SPR

Set Protection

This bit must be set to select the Set Protection operation. The Set Protection operation

can be used to program 0s in place of 1s in the Flash Non-Volatile Protection Registers.

The Flash Address in which to program must be written in the FARH/L registers, while

the Flash Data to be programmed must be written in the FDR0H/L before starting the

execution by setting bit WMS. A sequence error is flagged by bit SEQER of FER if the

address written in FARH/L is not in the range of 0x0E8FB0 to 0x08DFBF. SPR bit is

automatically reset at the end of the Set Protection operation.

Table 8.

Flash control register 0 high (continued)

Bit Name

Function

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