DSPIC33FJ32GP302THSLASHSP datasheet(37/403 Pages) MICROCHIP

37 / 403 page

 2009 Microchip Technology Inc.

Preliminary

DS70292D-page 37

dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04

4.0

MEMORY ORGANIZATION

The dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/

X04,

and

dsPIC33FJ128GPX02/X04

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

the

dsPIC33FJ32GP302/304,

dsPIC33FJ64GPX02/X04,

and

dsPIC33FJ128GPX02/X04

devices

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 map for the dsPIC33FJ32GP302/304,

dsPIC33FJ64GPX02/X04, and dsPIC33FJ128GPX02/

X04 devices is shown in Figure 4-1.

FIGURE 4-1:

PROGRAM MEMORY MAP FOR dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/

X04, AND dsPIC33FJ128GPX02/X04 DEVICES

Note:

This data sheet summarizes the features

the

dsPIC33FJ32GP302/304,

dsPIC33FJ64GPX02/X04,

and

dsPIC33FJ128GPX02/X04

families

devices. It is not intended to be a compre-

hensive reference source. To complement

the information in this data sheet, refer to

“Section 3. Data Memory” (DS70202) of

the “dsPIC33F/PIC24H Family Reference

Manual”, which is available from the

Microchip website (www.microchip.com).

Reset Address

0x000000

0x0000FE

0x000002

0x000100

Device Configuration

User Program

Flash Memory

(11264 instructions)

0x800000

0xF80000

Registers

0xF80017

0xF80018

DEVID (2)

0xFEFFFE

0xFF0000

0xFF0002

0xF7FFFE

Unimplemented

(Read ‘0’s)

GOTO

Instruction

0x000004

Reserved

0x7FFFFE

Reserved

0x000200

0x0001FE

0x000104

Alternate Vector Table

Reserved

Interrupt Vector Table

dsPIC33FJ32GP302/304

Note:

Memory areas are not shown to scale.

Reset Address

Device Configuration

User Program

Flash Memory

(22016 instructions)

Registers

DEVID (2)

Unimplemented

(Read ‘0’s)

GOTO

Instruction

Reserved

Alternate Vector Table

Reserved

Interrupt Vector Table

dsPIC33FJ64GPX02/X04

Reset Address

Device Configuration

User Program

Flash Memory

(44032 instructions)

Registers

DEVID (2)

Unimplemented

(Read ‘0’s)

GOTO

Instruction

Reserved

Alternate Vector Table

Reserved

Interrupt Vector Table

dsPIC33FJ128GPX02/X04

0x0057FE

0x005800

0x015800

0x0157FE

0x00AC00

0x00ABFE

Reserved

0xFFFFFE

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