MA330026 Microchip Technology, MA330026 Datasheet - Page 38

• Manufacturer Part Number: MA330026
• Description: Daughter Cards & OEM Boards dsPIC33FJ16MC102 Plug-In Module
• Manufacturer: Microchip Technology

Specifications of MA330026

• Rohs: yes
• Product: Plug-In Modules
• Core: PIC
• Data Bus Width: 16 bit
• Description/function: dsPIC33F MC 28 Pin QFN to 100 Pin Plug-in-Module
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3 V to 3.6 V
• For Use With: DM330021, DM330022, DM330023

dsPIC33FJ16GP101/102 AND dsPIC33FJ16MC101/102
4.1.1
The program memory space is organized in word-
addressable blocks. Although it is treated as 24 bits
wide, it is more appropriate to think of each address of
the program memory as a lower and upper word, with
the upper byte of the upper word being unimplemented.
The lower word always has an even address, while the
upper word has an odd address
Program memory addresses are always word-aligned
on the lower word, and addresses are incremented or
decremented by two during code execution. This
arrangement provides compatibility with data memory
space addressing and makes data in the program
memory space accessible.
FIGURE 4-2:
DS70652C-page 38
0x000001
0x000003
0x000005
0x000007
Address
msw
PROGRAM MEMORY
ORGANIZATION
Program Memory
PROGRAM MEMORY ORGANIZATION
‘Phantom’ Byte
(read as ‘0’)
most significant word (msw)
00000000
00000000
00000000
00000000
(Figure
23
4-2).
Preliminary
16
Instruction Width
least significant word (lsw)
4.1.2
All
dsPIC33FJ16MC101/102
addresses between 0x00000 and 0x000200 for hard-
coded program execution vectors. A hardware Reset
vector is provided to redirect code execution from the
default value of the PC on device Reset to the actual
start of code. A GOTO instruction is programmed by the
user application at 0x000000, with the actual address
for the start of code at 0x000002.
dsPIC33FJ16GP101/102 and dsPIC33FJ16MC101/
102 devices also have two interrupt vector tables,
located from 0x000004 to 0x0000FF and 0x000100 to
0x0001FF. These vector tables allow each of the
device interrupt sources to be handled by separate
Interrupt Service Routines (ISRs). A more detailed dis-
cussion of the interrupt vector tables is provided in
Section 7.1 “Interrupt Vector
8
INTERRUPT AND TRAP VECTORS
dsPIC33FJ16GP101/102
© 2011 Microchip Technology Inc.
0
devices
Table”.
(lsw Address)
PC Address
0x000000
0x000002
0x000004
0x000006
reserve
and
the