PIC18FXX39
DS30485A-page 40
Preliminary
2002 Microchip Technology Inc.
FIGURE 4-5:
DATA MEMORY MAP FOR PIC18FX439
Bank 0
Bank 1
Bank 14
Bank 15
Data Memory Map
BSR<3:0>
= 0000
= 0001
= 1111
080h
07Fh
F80h
FFFh
00h
7Fh
80h
FFh
Access Bank
When a = 0,
the BSR is ignored and the
Access Bank is used.
The first 128 bytes are General
Purpose RAM (from Bank 0).
The second 128 bytes are
Special
Function
Registers
(from Bank 15).
When a = 1,
the BSR is used to specify the
RAM location that the
instruction uses.
F7Fh
F00h
EFFh
1FFh
100h
0FFh
000h
Access RAM
FFh
00h
FFh
00h
FFh
00h
GPR
SFR
Unused
Access RAM High
Access RAM Low
Bank 3
to
200h
Unused
Read ‘00h’
= 1110
= 0011
(SFRs)
GPR
2FFh
300h
FFh
00h
Bank 2
= 0010
27Fh
280h
ProMPT Memory