PIC24HJ12GP202-I/SP Microchip Technology, PIC24HJ12GP202-I/SP Datasheet - Page 57

• Manufacturer Part Number: PIC24HJ12GP202-I/SP
• Description: IC PIC MCU FLASH 4KX24 28-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 24Hr

Specifications of PIC24HJ12GP202-I/SP

• Program Memory Type: FLASH
• Program Memory Size: 12KB (4K x 24)
• Package / Case: 28-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 21
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC24HJ
• Core: PIC
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: I2C/SPI/UART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10-ch x 10-bit or 10-ch x 12-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164337 - MODULE SOCKET FOR PM3 40DIPDV164033 - KIT START EXPLORER 16 MPLAB ICD2
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

7.0
The
reduces the numerous peripheral interrupt request
signals to a single interrupt request signal to the
PIC24HJ12GP201/202 CPU. It has the following
features:
• Up to eight processor exceptions and software traps
• Seven 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
7.1
The Interrupt Vector Table is shown in Figure 7-1. 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. Lower addresses generally have a higher
natural priority. For example, the interrupt associated
with vector 0 will take priority over interrupts at any
other vector address.
PIC24HJ12GP201/202 devices implement up to 21
unique interrupts and 4 nonmaskable traps. These are
summarized in Table 7-1 and Table 7-2.
© 2009 Microchip Technology Inc.
Note:
source
support
PIC24HJ12GP201/202
INTERRUPT CONTROLLER
Interrupt Vector Table
This data sheet summarizes the features
of the PIC24HJ12GP201/202 family of
devices. However, it is not intended to be
a comprehensive reference source. To
complement the information in this data
sheet, refer to the “PIC24H Family
Reference
“Interrupts (Part II)” (DS70233), which is
available from the Microchip web site
(www.microchip.com).
Manual”,
interrupt
Section
controller
29.
Preliminary
PIC24HJ12GP201/202
7.1.1
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT, as shown in Figure 7-1. 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 way to
switch between an application and a support
environment without requiring the interrupt vectors to
be reprogrammed. This feature also enables switching
between applications to facilitate evaluation of different
software algorithms at run time. If the AIVT is not
needed, the AIVT should be programmed with the
same addresses used in the IVT.
7.2
A device Reset is not a true exception because the
interrupt controller is not involved in the Reset process.
The PIC24HJ12GP201/202 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 application
can use a GOTO instruction at the Reset address that
redirects program execution to the appropriate start-up
routine.
Note:
is
Reset Sequence
provided
ALTERNATE INTERRUPT 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
ALTIVT
DS70282D-page 55
control
bit