Datasheet

PIC18F2455/2550/4455/4550
DS39632E-page 66 © 2009 Microchip Technology Inc.
FIGURE 5-5: DATA MEMORY MAP
Bank 0
Bank 1
Bank 14
Bank 15
Data Memory Map
BSR<3:0>
= 0000
= 0001
= 1111
060h
05Fh
F60h
FFFh
00h
5Fh
60h
FFh
Access Bank
When a = 0:
The BSR is ignored and the
Access Bank is used.
The first 96 bytes are
general purpose RAM
(from Bank 0).
The remaining 160 bytes are
Special Function Registers
(from Bank 15).
When a = 1:
The BSR specifies the bank
used by the instruction.
F5Fh
F00h
EFFh
1FFh
100h
0FFh
000h
Access RAM
FFh
00h
FFh
00h
FFh
00h
GPR
GPR
SFR
Access RAM High
Access RAM Low
Bank 2
= 0110
= 0010
(SFRs)
2FFh
200h
3FFh
300h
4FFh
400h
5FFh
500h
6FFh
600h
7FFh
700h
800h
Bank 3
Bank 4
Bank 5
Bank 6
Bank 7
Bank 8
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
00h
GPR
GPR
(1)
GPR
GPR
(1)
GPR
(1)
GPR
(1)
FFh
= 0011
= 0100
= 0101
= 0111
= 1000
Unused
Read as 00h
to
= 1110
Note 1: These banks also serve as RAM buffer for USB operation. See Section 5.3.1 “USB RAM” for more
information.
Unused