DSPIC33FJ128GP706A-I Datasheet, PDF (41/338 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJXXXGPX06A/X08A/X10A
4.0 MEMORY ORGANIZATION
Note:
This data sheet summarizes the features
of the dsPIC33FJXXXGPX06A/X08A/X10A
family of devices. However, it is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to Section 3. “Data
Memory” (DS70202) and Section 4. “Pro-
gram Memory” (DS70203) in the
“dsPIC33F/PIC24H Family Reference
Manual”, which are available from the
Microchip web site (www.microchip.com).
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
dsPIC33FJ64GPXXXA
GOTO Instruction
Reset Address
Interrupt Vector Table
Reserved
Alternate Vector Table
User Program
Flash Memory
(22K instructions)
dsPIC33FJ128GPXXXA
GOTO Instruction
Reset Address
Interrupt Vector Table
Reserved
Alternate Vector Table
User Program
Flash Memory
(44K instructions)
dsPIC33FJ256GPXXXA
GOTO Instruction
Reset Address
Interrupt Vector Table
Reserved
Alternate Vector Table
0x000000
0x000002
0x000004
0x0000FE
0x000100
0x000104
0x0001FE
0x000200
User Program
Flash Memory
(88K instructions)
0x00ABFE
0x00AC00
0x0157FE
0x015800
Unimplemented
(Read ‘0’s)
Unimplemented
(Read ‘0’s)
Unimplemented
(Read ‘0’s)
0x02ABFE
0x02AC00
0x7FFFFE
0x800000
Reserved
Reserved
Reserved
Device Configuration
Registers
Reserved
Device Configuration
Registers
Reserved
Device Configuration
Registers
0xF7FFFE
0xF80000
0xF80017
0xF80010
Reserved
Note:
DEVID (2)
DEVID (2)
Memory areas are not shown to scale.
 2009 Microchip Technology Inc.
Preliminary
DEVID (2)
0xFEFFFE
0xFF0000
0xFFFFFE
DS70593B-page 41