Datasheet

 2011-2012 Microchip Technology Inc. DS75018C-page 37
dsPIC33FJ06GS001/101A/102A/202A and dsPIC33FJ09GS302
4.0 MEMORY ORGANIZATION
The device architecture features separate program and
data memory spaces and buses. This architecture also
allows the direct access to program memory from the
data space during code execution.
4.1 Program Address Space
The device 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 4.7
“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 constant current source trim value
and Device ID sections of the configuration memory
space.
The device memory maps are shown in Figure 4-1.
FIGURE 4-1: PROGRAM MEMORY MAPS FOR dsPIC33FJ06GS001/101A/102A/202A and
dsPIC33FJ09GS302 DEVICES
Note: This data sheet summarizes the features
of the dsPIC33FJ06GS001/101A/102A/
202A and dsPIC33FJ09GS302 families of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 4. “Program
Memory” (DS70203) in the “dsPIC33F/
PIC24H Family Reference Manual”, which
is available from the Microchip web site
(www.microchip.com).
Reset Address
0x000000
0x0000FE
0x000002
0x000100
User Program
Flash Memory
0x000FF0
0x000FEE
(1784 instructions)
0x800000
DEVID (2)
0xFEFFFE
0xFF0000
0xFFFFFE
Unimplemented
(Read ‘0’s)
GOTO Instruction
0x000004
Reserved
0x7FFFFE
0x000200
0x0001FE
0x000104
Alternate Vector Table
Reserved
Interrupt Vector Table
dsPIC33FJ06GS001/101A/102A/202A
Configuration Memory Space
User Memory Space
Reset Address
0x000000
0x0000FE
0x000002
0x000100
User Program
Flash Memory
0x0017F0
0x0017EE
(2808 instructions)
0x800000
Unimplemented
(Read ‘0’s)
GOTO Instruction
0x000004
Reserved
0x7FFFFE
0x000200
0x0001FE
0x000104
Alternate Vector Table
Reserved
Interrupt Vector Table
dsPIC33FJ09GS302
Configuration Memory Space
User Memory Space
Reserved
0xFF0002
DEVID (2)
Reserved
0xFEFFFE
0xFF0000
0xFFFFFE
0xFF0002
Configuration
Configuration
0x001000
0x000FFE
0x001800
0x0017FE
0x800840
Constant Current
0x800840
Constant Current
Source Trim Value Source Trim Value