SW006012 Microchip Technology, SW006012 Datasheet - Page 87

• Manufacturer Part Number: SW006012
• Description: C COMPILER FOR DSPIC30F FAMILY
• Manufacturer: Microchip Technology
• Type: MPLAB® C30 Compilerr
• Series: PIC24 & DsPICr

Specifications of SW006012

• Supported Families: PIC24, DsPIC30F And DsPIC33F
• Core Architecture: PIC, DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC24 MCUs And DsPIC DSCs
• Tool Type: Compiler
• Processor Series: PIC24, dsPIC
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: dsPIC30F
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.1
5.2
5.3
5.4
© 2007 Microchip Technology Inc.
INTRODUCTION
HIGHLIGHTS
DATA REPRESENTATION
INTEGER
This section discusses the MPLAB C30 data types.
Items discussed in this chapter are:
• Data Representation
• Integer
• Floating Point
• Pointers
Multibyte quantities are stored in “little endian” format, which means:
• The least significant byte is stored at the lowest address
• The least significant bit is stored at the lowest-numbered bit position
As an example, the long value of 0x12345678 is stored at address 0x100 as follows:
As another example, the long value of 0x12345678 is stored in registers w4 and w5:
Table 5-1 shows integer data types are supported in MPLAB C30.
TABLE 5-1:
char, signed char
unsigned char
short, signed short
unsigned short
int, signed int
unsigned int
long, signed long
unsigned long
long long**, signed long long**
unsigned long long**
** ANSI-89 extension
0x5678
0x100
0x78
w4
Chapter 5. Data Types
0x1234
0x101
0x56
INTEGER DATA TYPES
w5
Type
0x102
0x34
0X103
0x12
Bits
16
16
16
16
32
32
64
64
8
8
USER’S GUIDE
MPLAB
-32768
-32768
-128
Min
-2
-2
0
0
0
0
0
31
63
DS51284F-page 81
®
2
2
2
2
32767
65535
32767
65535
Max
31
32
63
64
127
255
C30
- 1
- 1
- 1
- 1