Microchip Technology AC164139 Data Sheet
PIC24FJ256DA210 FAMILY
DS39969B-page 48
2010 Microchip Technology Inc.
4.2.1
DATA SPACE WIDTH
The data memory space is organized in
byte-addressable, 16-bit wide blocks. Data is aligned
in data memory and registers as 16-bit words, but all
data space EAs resolve to bytes. The Least Significant
Bytes (LSBs) of each word have even addresses, while
the Most Significant Bytes (MSBs) have odd
addresses.
byte-addressable, 16-bit wide blocks. Data is aligned
in data memory and registers as 16-bit words, but all
data space EAs resolve to bytes. The Least Significant
Bytes (LSBs) of each word have even addresses, while
the Most Significant Bytes (MSBs) have odd
addresses.
FIGURE 4-3:
DATA SPACE MEMORY MAP FOR PIC24FJ256DA210 FAMILY DEVICES
(4)
Note 1: 24-Kbyte RAM variants (PIC24FJXXXDA1XX devices have implemented RAM only up to 0x67FF).
2: Valid only for 96-Kbyte RAM variants (PIC24FJXXXDA2XX).
3: Valid only for variants with the EPMP module (PIC24FJXXXDAX10).
4: Data memory areas are not shown to scale.
3: Valid only for variants with the EPMP module (PIC24FJXXXDAX10).
4: Data memory areas are not shown to scale.
0000h
07FEh
07FEh
FFFEh
LSB
Address
LSB
MSB
MSB
Address
0001h
07FFh
1FFFh
FFFFh
8001h
8000h
7FFFh
0801h
0800h
2001h
Near
1FFEh
SFR
SFR Space
30 Kbytes Data RAM
2000h
7FFEh
EDS Window
Space
Data Space
Lower 32 Kbytes
Data Space
EDS Page 0x1
EDS Page 0x2
EDS Page 0x3 (2 KB)
EDS Page 0x4
EDS Page 0x200
EDS Page 0x300
EDS Page 0x1FF
EDS Page 0x2FF
EDS Page 0x3FF
Internal Extended
Data RAM(66 Kbytes)
Data RAM(66 Kbytes)
(2)
Program Space Visibility
Area to Access Lower
Word of Program Memory
EPMP Memory Space
(3)
Program Space Visibility
Area to Access Upper
Word of Program Memory
Upper 32 Kbytes
Data Space
(32 KB)
(32 KB)
67FEh
(1)
67FFh
(1)