Datasheet

 2008-2011 Microchip Technology Inc. DS39927C-page 49
PIC24F16KA102 FAMILY
EXAMPLE 5-3: LOADING THE WRITE BUFFERS – ASSEMBLY LANGUAGE CODE
EXAMPLE 5-4: LOADING THE WRITE BUFFERS – ‘C’ 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 #0x1500, 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
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; 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
// C example using MPLAB C30
#define NUM_INSTRUCTION_PER_ROW 64
int __attribute__ ((space(auto_psv))) progAddr = 0x1234 // Variable located in Pgm Memory
unsigned int offset;
unsigned int i;
unsigned int progData[2*NUM_INSTRUCTION_PER_ROW]; // Buffer of data to write
//Set up NVMCON for row programming
NVMCON = 0x4004; // Initialize NVMCON
//Set up pointer to the first memory location to be written
TBLPAG = __builtin_tblpage(&progAddr); // Initialize PM Page Boundary SFR
offset = __
builtin_tbloffset(&progAddr); // Initialize lower word of address
//Perform TBLWT instructions to write necessary number of latches
for(i=0; i < 2*NUM_INSTRUCTION_PER_ROW; i++)
{
__builtin_tblwtl(offset, progData[i++]); // Write to address low word
__builtin_tblwth(offset, progData[i]); // Write to upper byte
offset = offset + 2; // Increment address
}