PIC24FJ128GL303 datasheet(63/424 Pages) MICROCHIP

Part #	PIC24FJ128GL303

Description	16-Bit eXtreme Low-Power Microcontrollers with LCD Controller in Low Pin Count Packages

PDF	424 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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63 / 424 page

 2019-2020 Microchip Technology Inc.

DS30010198B-page 63

PIC24FJ128GL306 FAMILY

TABLE 6-1:

EXAMPLE PAGE ERASE

EXAMPLE 6-1:

ERASING A PROGRAM MEMORY BLOCK (‘C’ LANGUAGE CODE)

Step 1: Set the NVMCON register to erase a page.

MOV

#0x4003, W0

MOV

W0, NVMCON

Step 2: Load the address of the page to be erased into the NVMADRU/NVMADR register pair.

MOV

#PAGE_ADDR_LO, W0

MOV

W0, NVMADR

MOV

#PAGE_ADDR_HI, W0

MOV

W0, NVMADRU

Step 3: Set the WR bit.

MOV

#0x55, W0

MOV

W0, NVMKEY

MOV

#0xAA, W0

MOV

W0, NVMKEY

BSET

NVMCON, #WR

NOP

// C example using MPLAB XC16

unsigned

long progAddr = 0xXXXXXX;

// Address of row to write

unsigned

int

offset;

//Set up pointer to the first memory location to be written

NVMADRU = progAddr>>16;

// Initialize PM Page Boundary SFR

NVMADR

= progAddr & 0xFFFF;

// Initialize lower word of address

NVMCON

= 0x4003;

// Initialize NVMCON

asm("DISI #5");

// Block all interrupts with priority <7

// for next 5 instructions

__builtin_write_NVM();

// check function to perform unlock

// sequence and set WR

PIC24FJ128GL303 Datasheet(PDF) 63 Page - Microchip Technology

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