Datasheet

 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 of
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
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
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24FJ64GA PIC24FJ96GA PIC24FJ128GA
Configuration Memory Space
User Memory Space
Flash Config Words
Flash Config Words
Flash Config Words
010000h
00FFFEh
015800h
0157FEh
Note: Memory areas are not shown to scale.