DSPIC33FJ64MC506-I/PT Microchip Technology Inc., DSPIC33FJ64MC506-I/PT Datasheet - Page 89
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DSPIC33FJ64MC506-I/PT
Manufacturer Part Number
DSPIC33FJ64MC506-I/PT
Description
DSP, 16-Bit, 64KB Flash, 8KB RAM, 53 I/O, TQFP-64
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC33FJ64MC506-IPT.pdf
(370 pages)
Specifications of DSPIC33FJ64MC506-I/PT
A/d Inputs
16-Channels, 12-Bit
Comparators
8
Cpu Speed
40 MIPS
Eeprom Memory
0 Bytes
Input Output
53
Interface
CAN, I2C, SPI, UART/USART
Ios
53
Memory Type
Flash
Number Of Bits
16
Package Type
64-pin TQFP
Programmable Memory
64K Bytes
Ram Size
8K Bytes
Timers
9-16-bit, 4-32-bit
Voltage, Range
3-3.6
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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6.0
The dsPIC33F interrupt controller reduces the numer-
ous peripheral interrupt request signals to a single
interrupt request signal to the dsPIC33F CPU. It has
the following features:
• Up to 8 processor exceptions and software traps
• 7 user-selectable priority levels
• Interrupt Vector Table (IVT) with up to 118 vectors
• A unique vector for each interrupt or exception
• Fixed priority within a specified user priority level
• Alternate Interrupt Vector Table (AIVT) for debug
• Fixed interrupt entry and return latencies
6.1
The Interrupt Vector Table (IVT) is shown in Figure 6-1.
The IVT resides in program memory, starting at location
000004h. The IVT contains 126 vectors consisting of
8 nonmaskable trap vectors plus up to 118 sources of
interrupt. In general, each interrupt source has its own
vector. Each interrupt vector contains a 24-bit wide
address. The value programmed into each interrupt
vector location is the starting address of the associated
Interrupt Service Routine (ISR).
Interrupt vectors are prioritized in terms of their natural
priority; this priority is linked to their position in the
vector table. All other things being equal, lower
addresses have a higher natural priority. For example,
the interrupt associated with vector 0 will take priority
over interrupts at any other vector address.
dsPIC33F devices implement up to 67 unique
interrupts and 5 nonmaskable traps. These are
summarized in Table 6-1 and Table 6-2.
© 2007 Microchip Technology Inc.
Note:
source
support
INTERRUPT CONTROLLER
Interrupt Vector Table
This data sheet summarizes the features
of this group of dsPIC33F devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC30F
Family Reference Manual” (DS70046).
Preliminary
6.1.1
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT, as shown in Figure 6-1. Access to the
AIVT
(INTCON2<15>). If the ALTIVT bit is set, all interrupt
and exception processes use the alternate vectors
instead of the default vectors. The alternate vectors are
organized in the same manner as the default vectors.
The AIVT supports debugging by providing a means to
switch between an application and a support environ-
ment without requiring the interrupt vectors to be
reprogrammed. This feature also enables switching
between applications for evaluation of different soft-
ware algorithms at run time. If the AIVT is not needed,
the AIVT should be programmed with the same
addresses used in the IVT.
6.2
A device Reset is not a true exception because the
interrupt controller is not involved in the Reset process.
The dsPIC33F device clears its registers in response to
a Reset, which forces the PC to zero. The digital signal
controller then begins program execution at location
0x000000. The user programs a GOTO instruction at the
Reset address which redirects program execution to
the appropriate start-up routine.
Note:
is
Reset Sequence
provided
ALTERNATE VECTOR TABLE
Any unimplemented or unused vector
locations in the IVT and AIVT should be
programmed with the address of a default
interrupt handler routine that contains a
RESET instruction.
by
the
dsPIC33F
ALTIVT
DS70165E-page 87
control
bit
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