MA240029 Microchip Technology, MA240029 Datasheet - Page 43

• Manufacturer Part Number: MA240029
• Description: Daughter Cards & OEM Boards PIC24FJ128GA310 Gen Purpose PIM
• Manufacturer: Microchip Technology

Specifications of MA240029

• Rohs: yes
• Product: Daughter Cards
• Core: PIC
• Description/function: Plug-in module
• Interface Type: I2C, SPI
• Tool Is For Evaluation Of: PIC24FJ128GA310
• For Use With: Explorer 16 Development Board

4.2
The PIC24F core has a 16-bit wide data memory space,
addressable as a single linear range. The data space is
accessed using two Address Generation Units (AGUs),
one each for read and write operations. The data space
memory map is shown in
The 16-bit wide data addresses in the data memory
space point to bytes within the Data Space (DS). This
gives a DS address range of 64 Kbytes or 32K words.
The lower half (0000h to 7FFFh) is used for
implemented (on-chip) memory addresses.
FIGURE 4-3:
 2010-2011 Microchip Technology Inc.
Lower 32 Kbytes
Upper 32 Kbytes
Note:
Note:
Data Space
Data Space
Data Memory Space
Section
supersedes the information in the FRM.
This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F
Extended Data Space (EDS)” (DS39733).
The information in this data sheet
Memory areas not shown to scale.
Address
0001h
07FFh
0801h
1FFFh
2001h
2801h
7FFFh
8001h
FFFFh
MSB
Family
45.
DATA SPACE MEMORY MAP FOR PIC24FJ128GA310 FAMILY DEVICES
Figure
(1)
“Data
Reference
4-3.
8 Kbytes Data RAM
MSB
Unimplemented
EDS Window
SFR Space
Memory
Manual”,
LSB
PIC24FJ128GA310 FAMILY
with
0000h
07FEh
0800h
1FFEh
2000h
2800h
7FFEh
8000h
FFFEh
LSB
Address
Space
SFR
The upper half of data memory address space (8000h to
FFFFh) is used as a window into the Extended Data
Space (EDS). This allows the microcontroller to directly
access a greater range of data beyond the standard
16-bit address range. EDS is discussed in detail in
Section 4.2.5 “Extended Data Space
The lower half of DS is compatible with previous PIC24F
microcontrollers without EDS. All PIC24FJ128GA310
family devices implement 8 Kbytes of data RAM in the
lower half of DS, from 0800h to 27FFh.
4.2.1
The
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.
EDS Page 0x3 (2 Kbytes)
EDS Page 0x1FF
EDS Page 0x200
EDS Page 0x2FF
EDS Page 0x300
EDS Page 0x3FF
EDS Page 0x1
EDS Page 0x2
EDS Page 0x4
Data Space
data
(32 Kbytes)
(32 Kbytes)
Near
DATA SPACE WIDTH
memory
space
Internal Extended
Data RAM (66 Kbytes)
EPMP Memory Space
Program Space Visibility
Area to Access Lower
Word of Program Memory
Program Space Visibility
Area to Access Upper
Word of Program Memory
is
DS39996F-page 43
(EDS)”.
organized
in