ST10F276E datasheet(42/235 Pages) STMICROELECTRONICS

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Internal Flash memory

ST10F276E

42/235

Doc ID 12303 Rev 3

4.5

Write operation examples

In this section, examples for each kind of Flash write operation are presented.

Word program

Example: 32-bit Word Program of data 0xAAAAAAAA at address 0x0C5554 in XFLASH

Module.

FCR0H|= 0x2000; /*Set WPG in FCR0H*/

FARL = 0x5554; /*Load Add in FARL*/

FARH = 0x000C; /*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 0x095558 and

data 0xAA55AA55 at address 0x09555C in IFLASH Module.

FCR0H|= 0x1080; /*Set DWPG, SMOD*/

FARL

= 0x5558; /*Load Add in FARL*/

FARH

= 0x0009; /*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 a even Word: bit

ADD2 of FARL is ignored.

Sector erase

Example: Sector Erase of sectors B3F1 and B3F0 of Bank 3 in XFLASH Module.

FCR0H|= 0x0800; /*Set SER in FCR0H*/

FCR1H|= 0x0003; /*Set B3F1, B3F0*/

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.

ST10F276E Datasheet(PDF) 42 Page - STMicroelectronics

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