Datasheet

 2009-2012 Microchip Technology Inc. DS70593D-page 39
dsPIC33FJXXXGPX06A/X08A/X10A
4.0 MEMORY ORGANIZATION
The dsPIC33FJXXXGPX06A/X08A/X10A 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 program address memory space of the
dsPIC33FJXXXGPX06A/X08A/X10A 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 4.6
“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 usage for the
dsPIC33FJXXXGPX06A/X08A/X10A of devices is
shown in Figure 4-1.
FIGURE 4-1: PROGRAM MEMORY FOR dsPIC33FJXXXGPX06A/X08A/X10A DEVICES
Note: This data sheet summarizes the features
of the dsPIC33FJXXXGPX06A/X08A/
X10A family of devices. However, it is not
intended to be a comprehensive refer-
ence source. To complement the informa-
tion in this data sheet, refer to Section 3.
“Data Memory” (DS70202) and Section
4. “Program Memory” (DS70203) in the
“dsPIC33F/PIC24H Family Reference
Manual”, which are available from the
Microchip web site (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
dsPIC33FJ64GPXXXA dsPIC33FJ128GPXXXA dsPIC33FJ256GPXXXA
Configuration Memory Space
User Memory Space
0x015800
0x0157FE
Note: Memory areas are not shown to scale.
User Program
(44K instructions)
Flash Memory
(Read ‘0’s)
Unimplemented
0x02AC00
0x02ABFE