PIC24FJ128GA006-IPT datasheet(31/258 Pages) MICROCHIP

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 2005-2012 Microchip Technology Inc.

DS39747F-page 31

PIC24FJ128GA010 FAMILY

4.0

MEMORY ORGANIZATION

As Harvard architecture devices, PIC24F micro-

controllers feature separate program and data memory

spaces and busses. This architecture also allows the

direct access of program memory from the data space

during code execution.

4.1

Program Address Space

The

program

address

memory

space

PIC24FJ128GA010 family devices is 4M instructions.

The space is addressable by a 24-bit value derived from

either the 23-bit Program Counter (PC) during program

execution, or from table operation or data space

remapping, as described in Section 4.3 “Interfacing

Program and Data Memory Spaces”

User access to the program memory space is restricted

to the lower half of the address range (000000h to

7FFFFFh). The exception is the use of TBLRD/TBLWT

operations, which use TBLPAG<7> to permit access to

the Configuration bits and Device ID sections of the

configuration memory space.

Memory maps for the PIC24FJ128GA010 family of

devices are shown in Figure 4-1.

FIGURE 4-1:

PROGRAM SPACE MEMORY MAP FOR PIC24FJ128GA010 FAMILY DEVICES

Reset Address

000000h

0000FEh

000002h

000100h

Device Configuration

User Flash

Program Memory

00AC00h

00ABFEh

(22K instructions)

800000h

F80000h

Registers

F8000Eh

F80010h

DEVID (2)

FEFFFEh

FF0000h

FFFFFEh

F7FFFEh

Unimplemented

(Read ‘0’s)

GOTO

Instruction

000004h

Reserved

7FFFFEh

Reserved

000200h

0001FEh

000104h

Alternate Vector Table

Reserved

Interrupt Vector Table

Reset Address

Device Configuration

User Flash

Program Memory

(32K instructions)

Registers

DEVID (2)

Unimplemented

(Read ‘0’s)

GOTO

Instruction

Reserved

Alternate Vector Table

Reserved

Interrupt Vector Table

Reset Address

Device Configuration

User Flash

Program Memory

(44K instructions)

Registers

DEVID (2)

Unimplemented

(Read ‘0’s)

GOTO

Instruction

Reserved

Alternate Vector Table

Reserved

Interrupt Vector Table

PIC24FJ64GA

PIC24FJ96GA

PIC24FJ128GA

Flash Config Words

010000h

00FFFEh

015800h

0157FEh

Note:

Memory areas are not shown to scale.

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