Microchip Technology MA330012 Datenbogen
©
2007 Microchip Technology Inc.
Preliminary
DS70165E-page 39
dsPIC33F
3.0
MEMORY ORGANIZATION
The dsPIC33F 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.
and data memory spaces and buses. This architecture
also allows the direct access of program memory from
the data space during code execution.
3.1
Program Address Space
The program address memory space of the dsPIC33F
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 3.6
“Interfacing Program and Data Memory Spaces”.
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 3.6
“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
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 Configuration bits and Device ID sections of the
configuration memory space.
Memory maps for the dsPIC33F family of devices are
shown in Figure 3-1.
shown in Figure 3-1.
FIGURE 3-1:
PROGRAM MEMORY MAP FOR dsPIC33F FAMILY DEVICES
Note:
This data sheet summarizes the features
of this group of dsPIC33F devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC30F
Family Reference Manual” (DS70046).
of this group of dsPIC33F devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC30F
Family Reference Manual” (DS70046).
Reset Address
0x000000
0x0000FE
0x000002
0x000100
Device Configuration
User Program
Flash Memory
0x00AC00
0x00ABFE
(22K instructions)
0x800000
0xF80000
Registers
0xF80017
0xF80010
0xF80010
DEVID (2)
0xFEFFFE
0xFF0000
0xFFFFFE
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
dsPIC33FJ64XXXXX
dsPIC33FJ128XXXXX
dsPIC33FJ256XXXXX
C
onf
igurat
ion M
e
mor
y
S
p
ace
U
s
er Mem
o
ry Sp
ac
e
0x015800
0x0157FE
User Program
(44K instructions)
Flash Memory
(Read ‘
0
’s)
Unimplemented
0x02AC00
0x02ABFE