ST10F296E datasheet(63/346 Pages) STMICROELECTRONICS

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ST10F296E

Internal Flash memory

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5.5.5

Erase suspend, program and resume

A sector erase operation can be suspended in order to program (word or double word)

another sector.

Example: Sector erase of sector B3F1 of Bank 3 in XFlash module.

FCR0H|= 0x0800;

/*Set SER in FCR0H*/

FCR1H|= 0x0002;

/*Set B3F1*/

FCR0H|= 0x8000;

/*Operation start*/

Example: Sector erase suspend

FCR0H|= 0x4000;

/*Set SUSP in FCR0H*/

/* Loop to wait for LOCK=0 and BSY bit(s)=0 */

{tmp = FCR0L ;

} while( (tmp && 0x00E6) );

Example: Word program of data 0x5555AAAA at address 0x0C5554 in XFlash module.

FCR0H&= 0xBFFF;

/*Rst SUSP in FCR0H*/

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 = 0x5555;

/*Load Data in FDR0H*/

FCR0H|= 0x8000;

/*Operation start*/

Once the program operation is finished, the erase operation can be resumed in the following

way:

FCR0H|= 0x0800;

/*Set SER in FCR0H*/

FCR0H|= 0x8000;

/*Operation resume*/

During the program operation in erase suspend, bits SER and SUSP are low. A word or

double word program during erase suspend cannot be suspended.

To summarize:

●

A sector erase can be suspended by setting SUSP bit

●

To perform a word program operation during erase suspend, bits SUSP and SER must

first be reset, then bits WPG and WMS can be set.

●

To resume the sector erase operation bit SER must be set again

●

It is forbidden to start any write operation when the SUSP bit is set

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ST10F296E Datasheet(PDF) 63 Page - STMicroelectronics

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