ST10F276E datasheet(30/235 Pages) STMICROELECTRONICS

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Internal Flash memory

ST10F276E

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Doc ID 12303 Rev 3

SER

Sector erase

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

Sector Erase operation allows to erase all the Flash locations to 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 pre-program the sectors to 0x00, because this is done

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

DWPG

Double word program

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

modules. The Double Word Program operation allows 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 2 Flash Data 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.

WPG

Word program

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

modules. The Word Program operation allows 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.

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 bits BSYx). When in

Program Suspend, the two Flash modules accept only the following operations: Read

and Program Resume. When in Erase Suspend the modules accept only the following

operations: Read, Erase Resume and Program (Word or Double Word; Program

operations cannot be suspended during Erase Suspend). To resume the 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.

WMS

Write mode start

This bit must be set to start every write operation in the Flash modules. At the end of

the write operation or during a Suspend, this bit is automatically reset. To resume a

suspended operation, this bit must be set again. It is forbidden to set this bit if bit ERR

of FER is high (the operation is not accepted). It is also forbidden to start a new write

(program or erase) operation (by setting WMS high) when bit SUSP of FCR0 is high.

Resetting this bit by software has no effect.

Table 7.

Flash control register 0 high (continued)

Bit

Function

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