Table of Contents
Advertisement
3
Memory Organization
The XC82x CPU operates in the following five address spaces:
•
8 Kbytes of Boot ROM program memory
•
256 bytes of internal RAM data memory
•
256 bytes of XRAM memory
(XRAM can be read/written as program memory or external data memory)
•
a 128-byte Special Function Register area
•
4 Kbytes of Flash program memory
Figure 3-1
illustrates the memory address spaces of the XC82x.
FFFF
F100
XRAM
256 Bytes
F000
E000
Boot ROM
8 KBytes
C000
B000
Flash Bank 0
1)
4 KBytes
A000
1000
Flash Bank 0
4 KBytes
0000
Code Space
1)
Physically one 4-Kbyte Flash bank, mapped to both address range .
Figure 3-1
Memory Map of XC82x
User's Manual
Memory Organization, V 0.1
H
H
XRAM
256 Bytes
H
H
H
H
H
H
H
External Data Space
FFFF
H
F100
H
F000
H
Indirect
Address
Internal RAM
7F
H
Internal RAM
40
H
00
0000
H
H
Internal Data Space
3-1
XC82x
Memory Organization
Direct
Address
FF
H
Special Function
Registers
80
H
In Debug Mode, this 64-byte address area
is replaced by a 64-byte Monitor RAM.
Memory Map User Mode
V1.0, 2010-02
Advertisement
Table of Contents
