M58LT128GS datasheet(83/98 Pages) STMICROELECTRONICS

83 / 98 page

M58LT128GST, M58LT128GSB

13 Part Numbering

83/98

Appendix C Flowcharts and Pseudo Codes

Figure 19. Program Flowchart and Pseudo Code

Status check of SR1 (Protected Block), SR3 (VPP Invalid) and SR4 (Program Error) can be made after each program

operation or after a sequence.

If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

Any address within the bank can equally be used.

Write 40h or 10h (3)

AI06170b

Start

Write Address

& Data

Read Status

YES

SR7 = 1

YES

SR3 = 0

SR4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

program_command (addressToProgram, dataToProgram) {:

writeToFlash (addressToProgram, 0x40);

/*writeToFlash (addressToProgram, 0x10);*/

/*see note (3)*/

do {

status_register=readFlash (addressToProgram);

"see note (3)";

/* E or G must be toggled*/

} while (status_register.SR7== 0) ;

if (status_register.SR3==1) /*VPP invalid error */

error_handler ( ) ;

YES

End

YES

SR1 = 0

Program to Protected

Block Error (1, 2)

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

if (status_register.SR4==1) /*program error */

error_handler ( ) ;

if (status_register.SR1==1) /*program to protect block error */

error_handler ( ) ;

}

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