PIC24F16KL402 Datasheet, PDF (51/260 Pages) Microchip Technology – Low-Power, Low-Cost, General Purpose 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KL402 FAMILY
EXAMPLE 5-2: ERASING A PROGRAM MEMORY ROW – ‘C’ LANGUAGE CODE
// C example using MPLAB C30
int __attribute__ ((space(auto_psv))) progAddr = &progAddr; // Global variable located in Pgm Memory
unsigned int offset;
//Set up pointer to the first memory location to be written
TBLPAG = __builtin_tblpage(&progAddr);
offset = &progAddr & 0xFFFF;
// Initialize PM Page Boundary SFR
// Initialize lower word of address
__builtin_tblwtl(offset, 0x0000);
NVMCON = 0x4058;
asm("DISI #5");
__builtin_write_NVM();
// Set base address of erase block
// with dummy latch write
// Initialize NVMCON
// Block all interrupts for next 5
// instructions
// C30 function to perform unlock
// sequence and set WR
EXAMPLE 5-3: LOADING THE WRITE BUFFERS – ASSEMBLY LANGUAGE CODE
; Set up NVMCON for row programming operations
MOV
#0x4004, 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
; 32nd_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
 2011 Microchip Technology Inc.
DS31037B-page 51