ST10F272M_12 datasheet(40/176 Pages) STMICROELECTRONICS

40 / 176 page

Internal Flash memory

ST10F272M

40/176

Doc ID 12968 Rev 3

Example of indirect addressing mode

MOV

RWm, #ADDRESS;

/*Load Add in RWm*/

MOV

RWn, #DATA;

/*Load Data in RWn*/

MOV

[RWm], RWn;

/*Indirect addressing*/

Word program

Example: 32-bit word program of data 0xAAAAAAAA at address 0x025554

FCR0H|= 0x2000;

/*Set WPG in FCR0H*/

FARL

= 0x5554;

/*Load Add in FARL*/

FARH

= 0x0002;

/*Load Add in FARH*/

FDR0L = 0xAAAA;

/*Load Data in FDR0L*/

FDR0H = 0xAAAA;

/*Load Data in FDR0H*/

FCR0H|= 0x8000;

/*Operation start*/

Double word program

Example: Double word program (64-bit) of data 0x55AA55AA at address 0x035558 and

data 0xAA55AA55 at address 0x03555C in IFlash module.

FCR0H

|= 0x1000;

/*Set DWPG/

FARL

= 0x5558;

/*Load Add in FARL*/

FARH

= 0x0003;

/*Load Add in FARH*/

FDR0L

= 0x55AA;

/*Load Data in FDR0L*/

FDR0H

= 0x55AA;

/*Load Data in FDR0H*/

FDR1L

= 0xAA55;

/*Load Data in FDR1L*/

FDR1H

= 0xAA55;

/*Load Data in FDR1H*/

FCR0H

|= 0x8000;

/*Operation start*/

Double word program is always performed on the double word aligned on an even word: bit

ADD2 of FARL is ignored.

Sector erase

Example: Sector erase of sectors B0F1 and B0F0 of Bank 0 in IFlash module.

FCR0H

|= 0x0800;

/*Set SER in FCR0H*/

FCR1L

|= 0x0003;

/*Set B0F1, B0F0*/

FCR0H

|= 0x8000;

/*Operation start*/

Suspend and resume

Word program, double word program, and sector erase operations can be suspended in the

following way:

FCR0H

|= 0x4000;

/*Set SUSP in FCR0H*/

Then the operation can be resumed in the following way:

FCR0H

|= 0x0800;

/*Set SER in FCR0H*/

FCR0H

|= 0x8000;

/*Operation resume*/

Before resuming a suspended erase, FCR1H/FCR1L must be read to check if the erase is

already completed (FCR1H = FCR1L = 0x0000 if erase is complete). Original setup of select

operation bits in FCR0H/L must be restored before the operation resume, otherwise the

operation is aborted and bit RESER of FER is set.

ST10F272M Datasheet(PDF) 40 Page - STMicroelectronics

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