70592C datasheet(33/314 Pages) MICROCHIP

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DS70592C-page 33

PIC24HJXXXGPX06A/X08A/X10A

4.0

MEMORY ORGANIZATION

The PIC24HJXXXGPX06A/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

the

PIC24HJXXXGPX06A/X08A/X10A

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 4.4

“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 maps for the PIC24HJXXXGPX06A/X08A/

X10A family of devices are shown in Figure 4-1.

FIGURE 4-1:

PROGRAM MEMORY MAP FOR PIC24HJXXXGPX06A/X08A/X10A FAMILY DEVICES

Note:

This data sheet summarizes the features

of the PIC24HJXXXGPX06A/X08A/X10A

family of devices. However, it is not

intended to be a comprehensive refer-

ence source. To complement the informa-

tion in this data sheet, refer to Section 3.

“Data Memory” (DS70237) 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

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

PIC24HJ64XXXXXA

PIC24HJ128XXXXXA

PIC24HJ256XXXXXA

0x015800

0x0157FE

User Program

(44K instructions)

Flash Memory

(Read ‘0’s)

Unimplemented

0x02AC00

0x02ABFE

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