PIC16F526-ISLASHP datasheet(15/122 Pages) MICROCHIP

15 / 122 page

 2010 Microchip Technology Inc.

DS41326D-page 15

PIC16F526

4.0

MEMORY ORGANIZATION

The PIC16F526 memories are organized into program

memory and data memory (SRAM).The self-writable

portion of the program memory called Flash data

memory is located at addresses at 400h-43Fh. All

Program mode commands that work on the normal

Flash memory work on the Flash data memory. This

includes bulk erase, row/column/cycling toggles, Load

and Read data commands (Refer to Section 5.0

“Flash Data Memory Control” for more details). For

devices with more than 512 bytes of program memory,

a paging scheme is used. Program memory pages are

accessed using one STATUS register bit. For the

PIC16F526, with data memory register files of more

than 32 registers, a banking scheme is used. Data

memory banks are accessed using the File Select

4.1

Program Memory Organization for

the PIC16F526

The PIC16F526 device has an 11-bit Program Counter

(PC) capable of addressing a 2K x 12 program memory

space. Program memory is partitioned into user memory,

data memory and configuration memory spaces.

The user memory space is the on-chip user program

memory. As shown in Figure 4-1, it extends from 0x000

to 0x3FF and partitions into pages, including Reset

vector at address 0x3FF.

The data memory space is the Flash data memory

block and is located at addresses PC = 400h-43Fh. All

Program mode commands that work on the normal

Flash memory work on the Flash data memory block.

This includes bulk erase, Load and Read data

commands.

The configuration memory space extends from 0x440

to 0x7FF. Locations from 0x448 through 0x49F are

reserved. The user ID locations extend from 0x440

through 0x443. The Backup OSCCAL locations extend

from 0x444 through 0x447. The Configuration Word is

physically located at 0x7FF.

Refer

“PIC16F526

Memory

Programming

Specification” (DS41317) for more details.

FIGURE 4-1:

MEMORY MAP

000h

1FFh

Reset Vector

On-chip User

Program

Memory (Page 0)

200h

3FFh

3FEh

User ID Locations

Reserved

Configuration Word

400h

443h

444h

7FEh

7FFh

43Fh

440h

Unimplemented

On-chip User

Program

Memory (Page 1)

Flash Data Memory

448h

49Fh

Backup OSCCAL

Locations

447h

4A0h

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