Datasheet

© 2007-2011 Microchip Technology Inc. DS70289J-page 25
PIC24HJ32GP202/204 AND PIC24HJ16GP304
4.0 MEMORY ORGANIZATION
The PIC24HJ32GP202/204 and PIC24HJ16GP304
architecture features 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 devices program address memory space is 4M
instructions. The space is addressable by a 24-bit
value derived either from the 23-bit Program Counter
(PC) during program execution, or from table operation
or data space remapping as described in Section 4.6
“Interfacing Program and Data Memory Spaces”.
User application 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.
The memory maps for the PIC24HJ32GP202/204 and
PIC24HJ16GP304 devices are shown in Figure 4-1.
FIGURE 4-1: PROGRAM MEMORY FOR PIC24HJ32GP202/204 AND PIC24HJ16GP304 DEVICES
Note: This data sheet summarizes the features
of the PIC24HJ32GP202/204 and
PIC24HJ16GP304 family of devices.
However, it is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to the “dsPIC33F/PIC24H
Family Reference Manual”, “Section 4.
Program Memory” (DS70202), which is
available from the Microchip website
(www.microchip.com).
Reset Address
0x000000
0x0000FE
0x000002
0x000100
Device Configuration
User Program
Flash Memory
0x005800
0x0057FE
(11264 instructions)
0x800000
0xF80000
Registers
0xF80017
0xF80018
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
PIC24HJ32GP202/204
Configuration Memory Space
User Memory Space
Reset Address
0x000000
0x0000FE
0x000002
0x000100
Device Configuration
User Program
Flash Memory
0x002C00
0x002BFE
(5632 instructions)
0x800000
0xF80000
Registers
0xF80017
0xF80018
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
PIC24HJ16GP304
Configuration Memory Space
User Memory Space