Datasheet

ST10F269 5 - INTERNAL FLASH MEMORY
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;R12 contains the segment offset address to be
;programmed
;R13 contains the data to be programmed
EXTS R11, #1 ;use EXTended addressing for next MOV instruction
MOV [R12], R13 ;command cycle 4: the EPC starts execution of
;Programming Command
Data_Polling:
EXTS R11, #1 ;use EXTended addressing for next MOV instruction
MOV R7, [R12] ;read Flash Status register (FSB) in R7
MOV R6, R7 ;save it in R6 register
;Check if FSB.7 = Data.7 (i.e. R7.7 = R13.7)
XOR R7, R13
JNB R7.7, Prog_OK
;Check if FSB.5 = 1 (Programming Error)
JNB R6.5, Data_Polling
;Programming Error: verify is Flash programmed
;data is OK
EXTS R11, #1 ;use EXTended addressing for next MOV instruction
MOV R7, [R12] ;read Flash Status register (FSB) in R7
;Check if FSB.7 = Data.7
XOR R7, R13
JNB R7.7, Prog_OK
;Programming failed: Flash remains in Write
;Operation.
;To go back to normal Read operations, a Read/Reset
;command
;must be performed
Prog_Error:
MOV R7, #0F0h ;load register R7 with Read/Reset command
EXTS R11, #1 ;use EXTended addressing for next MOV instruction
MOV [R12], R7 ;address is don’t care for Read/Reset command
... ;here place specific Error handling code
...
...
;When programming operation finished succesfully,
;Flash is set back automatically to normal Read Mode
Prog_OK:
....
....