Datasheet

© 2009 Microchip Technology Inc. DS70175H-page 25
PIC24HJXXXGPX06/X08/X10
4.0 MEMORY ORGANIZATION
The PIC24HJXXXGPX06/X08/X10 architecture fea-
tures separate program and data memory spaces and
buses. 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 the
PIC24HJXXXGPX06/X08/X10 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 remap-
ping as described in Section 4.4 “Interfacing Program
and Data Memory Spaces”.
User access to the program memory space is restricted
to the lower half of the address range (0x000000 to
0x7FFFFF). 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 PIC24HJXXXGPX06/X08/X10
family of devices are shown in Figure 4-1.
FIGURE 4-1: PROGRAM MEMORY MAP FOR PIC24HJXXXGPX06/X08/X10 FAMILY DEVICES
Note: This data sheet summarizes the features
of the PIC24HJXXXGPX06/X08/X10 fam-
ily of devices. However, it is not intended
to be a comprehensive reference source.
To complement the information in this data
sheet, refer to the “PIC24H Family Refer-
ence Manual”, Section 3. “Data Memory”
(DS70237), which is available from the
Microchip website (www.microchip.com).
Reset Address
0x000000
0x0000FE
0x000002
0x000100
Device Configuration
User Program
Flash Memory
0x00AC00
0x00ABFE
(22K instructions)
0x800000
0xF80000
Registers
0xF80017
0xF80010
DEVID (2)
0xFEFFFE
0xFF0000
0xFFFFFE
0xF7FFFE
Unimplemented
(Read ‘0’s)
GOTO Instruction
0x000004
Reserved
0x7FFFFE
Reserved
0x000200
0x0001FE
0x000104
Alternate Vector Table
Reserved
Interrupt Vector Table
Reset Address
Device Configuration
Registers
DEVID (2)
Unimplemented
(Read ‘0’s)
GOTO
Instruction
Reserved
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
Reset Address
Device Configuration
User Program
Flash Memory
(88K instructions)
Registers
DEVID (2)
GOTO Instruction
Reserved
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24HJ64XXXXX PIC24HJ128XXXXX PIC24HJ256XXXXX
Configuration Memory Space
User Memory Space
0x015800
0x0157FE
User Program
(44K instructions)
Flash Memory
(Read ‘0’s)
Unimplemented
0x02AC00
0x02ABFE