Datasheet

 2012 Microchip Technology Inc. Preliminary DS41652A-page 15
PIC16F527
4.0 MEMORY ORGANIZATION
The PIC16F527 memories are organized into program
memory and data memory (SRAM).The self-writable
portion of the program memory called self-writable
Flash data memory is located at addresses 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
PIC16F527, with data memory register files of more
than 32 registers, a banking scheme is used. Data
memory banks are accessed using the File Select
Register (FSR).
4.1 Program Memory Organization for
PIC16F527
The PIC16F527 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 an
Interrupt vector at address 0x004 and a Reset vector at
address 0x3FF.
The data memory space is the self-writable 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 to “PIC16F527 Memory Programming
Specification” (DS41640) for more details.
FIGURE 4-1: MEMORY MAP
005h
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)
Data Memory
Self-writable
448h
49Fh
Backup OSCCAL
Locations
447h
4A0h
Configuration Memory
Space
Space
User Memory
Space
Flash Data Memory
Interrupt Vector
000h
004h