DSPIC33FJ64GP706 datasheet(35/322 Pages) MICROCHIP

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DS70286C-page 33

dsPIC33FJXXXGPX06/X08/X10

4.0

MEMORY ORGANIZATION

The

dsPIC33FJXXXGPX06/X08/X10

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

dsPIC33FJXXXGPX06/X08/X10

devices

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

dsPIC33FJXXXGPX06/X08/X10 of devices is shown in

Figure 4-1.

FIGURE 4-1:

PROGRAM MEMORY FOR dsPIC33FJXXXGPX06/X08/X10 DEVICES

Note:

This data sheet summarizes the features

of the dsPIC33FJXXXGPX06/X08/X10

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.

“Program Memory” (DS70203) in the

“dsPIC33F Family Reference Manual”,

which is 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

Alternate Vector Table

Reserved

Interrupt Vector Table

Reset Address

Device Configuration

User Program

Flash Memory

(88K instructions)

Registers

DEVID (2)

GOTO

Instruction

Reserved

Alternate Vector Table

Reserved

Interrupt Vector Table

dsPIC33FJ64GPXXX

dsPIC33FJ128GPXXX

dsPIC33FJ256GPXXX

0x015800

0x0157FE

Note:

Memory areas are not shown to scale.

User Program

(44K instructions)

Flash Memory

(Read ‘0’s)

Unimplemented

0x02AC00

0x02ABFE

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