PIC18F25J11-I/PT MICROCHIP [Microchip Technology], PIC18F25J11-I/PT Datasheet - Page 71

• Manufacturer Part Number: PIC18F25J11-I/PT
• Description: 28/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

5.0
There are two types of memory in PIC18 Flash
microcontrollers:
• Program Memory
• Data RAM
As Harvard architecture devices, the data and program
memories use separate busses; this allows for
concurrent access of the two memory spaces.
Section 6.0 “Flash Program Memory” provides
additional information on the operation of the Flash
program memory.
FIGURE 5-1:
© 2009 Microchip Technology Inc.
MEMORY ORGANIZATION
Note:
CALL, CALLW, RCALL,
RETURN, RETFIE, RETLW,
ADDULNK, SUBULNK
Unimplemented
Config. Words
PIC18FX4J11
Read as ‘0’
On-Chip
Memory
Sizes of memory areas are not to scale. Sizes of program memory areas are enhanced to show detail.
MEMORY MAPS FOR PIC18F46J11 FAMILY DEVICES
Unimplemented
PIC18FX5J50
Config. Words
Read as ‘0’
Stack Level 31
Stack Level 1
On-Chip
Memory
PC<20:0>
•
• •
PIC18F46J11 FAMILY
5.1
PIC18 microcontrollers implement a 21-bit program
counter, which is capable of addressing a 2-Mbyte
program memory space. Accessing a location between
the upper boundary of the physically implemented
memory and the 2-Mbyte address returns all ‘0’s (a
NOP instruction).
The PIC18F46J11 family offers a range of on-chip
Flash program memory sizes, from 16 Kbytes (up to
8,192
(32,768 single-word instructions).
Figure 5-1 provides the program memory maps for
individual family devices.
Unimplemented
PIC18FX6J11
Config. Words
21
Read as ‘0’
On-Chip
Memory
single-word
Program Memory Organization
000000h
003FFFh
007FFFh
00FFFFh
1FFFFFF
instructions)
DS39932C-page 71
to
64 Kbytes