Texas Instruments MSP430x1xx User Manual page 143

; Write one block starting at 0F000h.
; Must be executed from RAM, Assumes Flash is already erased.
; 514 kHz < SMCLK < 952 kHz
; Assumes ACCVIE = NMIIE = OFIE = 0.
MOV #32,R5
MOV #0F000h,R6
MOV #WDTPW+WDTHOLD,&WDTCTL
DINT
L1 BIT #BUSY,&FCTL3
JNZ L1
MOV #FWKEY+FSSEL1+FN0,&FCTL2 ; SMCLK/2
MOV #FWKEY,&FCTL3
MOV #FWKEY+BLKWRT+WRT,&FCTL1
L2 MOV Write_Value,0(R6)
L3 BIT #WAIT,&FCTL3
JZ L3
INCD R6
DEC R5
JNZ L2
MOV #FWKEY,&FCTL1
L4 BIT #BUSY,&FCTL3
JNZ L4
MOV #FWKEY+LOCK,&FCTL3
...
EINT
Flash Memory Operation
; Use as write counter
; Write pointer
; Disable WDT
; Disable interrupts
; Test BUSY
; Loop while busy
; Clear LOCK
; Enable block write
; Write location
; Test WAIT
; Loop while WAIT=0
; Point to next word
; Decrement write counter
; End of block?
; Clear WRT,BLKWRT
; Test BUSY
; Loop while busy
; Set LOCK
; Re-enable WDT if needed
; Enable interrupts
Flash Memory Controller 5-13