Microchip Technology MA330011 Hoja De Datos
©
2007 Microchip Technology Inc.
Preliminary
DS70165E-page 81
dsPIC33F
EXAMPLE 4-2:
LOADING THE WRITE BUFFERS
EXAMPLE 4-3:
INITIATING A PROGRAMMING SEQUENCE
; Set up NVMCON for row programming operations
MOV
#0x4001, W0
;
MOV
W0, NVMCON
; Initialize NVMCON
; Set up a pointer to the first program memory location to be written
; program memory selected, and writes enabled
MOV
#0x0000, W0
;
MOV
W0, TBLPAG
; Initialize PM Page Boundary SFR
MOV
#0x6000, W0
; An example program memory address
; Perform the TBLWT instructions to write the latches
; 0th_program_word
MOV
#LOW_WORD_0, W2
;
MOV
#HIGH_BYTE_0, W3
;
TBLWTL
W2, [W0]
; Write PM low word into program latch
TBLWTH
W3, [W0++]
; Write PM high byte into program latch
; 1st_program_word
MOV
#LOW_WORD_1, W2
;
MOV
#HIGH_BYTE_1, W3
;
TBLWTL
W2, [W0]
; Write PM low word into program latch
TBLWTH
W3, [W0++]
; Write PM high byte into program latch
; 2nd_program_word
MOV
#LOW_WORD_2, W2
;
MOV
#HIGH_BYTE_2, W3
;
TBLWTL
W2,
[W0]
; Write PM low word into program latch
TBLWTH
W3,
[W0++]
; Write PM high byte into program latch
•
•
•
•
•
; 63rd_program_word
MOV
#LOW_WORD_31, W2
;
MOV
#HIGH_BYTE_31, W3
;
TBLWTL
W2,
[W0]
; Write PM low word into program latch
TBLWTH
W3,
[W0++]
; Write PM high byte into program latch
DISI
#5
; Block all interrupts with priority <7
; for next 5 instructions
MOV
#0x55, W0
MOV
W0, NVMKEY
; Write the 55 key
MOV
#0xAA, W1
;
MOV
W1, NVMKEY
; Write the AA key
BSET
NVMCON, #WR
; Start the erase sequence
NOP
; Insert two NOPs after the
NOP
; erase command is asserted