PIC24FV32KA304_1 Datasheet, PDF (65/320 Pages) Microchip Technology – 20/28/44/48-Pin, General Purpose, 16-Bit Flash Microcontrollers with XLP Technology

PIC24FV32KA304 FAMILY
EXAMPLE 5-7: PROGRAMMING A SINGLE WORD OF FLASH PROGRAM MEMORY
; Setup a pointer to data Program Memory
MOV
#tblpage(PROG_ADDR), W0
;
MOV
W0, TBLPAG
;Initialize PM Page Boundary SFR
MOV
#tbloffset(PROG_ADDR), W0
;Initialize a register with program memory address
MOV
#LOW_WORD_N, W2
;
MOV
#HIGH_BYTE_N, W3
;
TBLWTL W2, [W0]
; Write PM low word into program latch
TBLWTH W3, [W0++]
; Write PM high byte into program latch
; Setup NVMCON for programming one word to data Program Memory
MOV
#0x4003, W0
;
MOV
W0, NVMCON
; Set NVMOP bits to 0011
DISI #5
; Disable interrupts while the KEY sequence is written
MOV
#0x55, W0
; Write the key sequence
MOV
W0, NVMKEY
MOV
#0xAA, W0
MOV
W0, NVMKEY
BSET NVMCON, #WR
; Start the write cycle
 2011 Microchip Technology Inc.
DS39995B-page 65