PIC24F04KA201-I/SS Microchip Technology, PIC24F04KA201-I/SS Datasheet - Page 82

• Manufacturer Part Number: PIC24F04KA201-I/SS
• Description: IC PIC MCU FLASH 512KX4 20-SSOP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 24Fr

Specifications of PIC24F04KA201-I/SS

• Core Size: 16-Bit
• Program Memory Size: 4KB (1.375K x 24)
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Number Of I /o: 18
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SSOP
• Controller Family/series: PIC24
• No. Of I/o's: 18
• Ram Memory Size: 512Byte
• Cpu Speed: 32MHz
• No. Of Timers: 3
• Processor Series: PIC24F
• Core: PIC
• Data Bus Width: 16 bit
• Data Ram Size: 512 B
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 32 KHz
• Number Of Programmable I/os: 12
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, DM240001
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 9 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC24F04KA201 FAMILY
7.4
7.4.1
To configure an interrupt source:
1.
2.
3.
4.
7.4.2
The method that is used to declare an ISR and initialize
the IVT with the correct vector address depends on the
programming language (i.e., C or assembler) and the
language development toolsuite that is used to develop
the application. In general, the user must clear the
interrupt flag in the appropriate IFSx register for the
source of the interrupt that the ISR handles. Otherwise,
the ISR will be re-entered immediately after exiting the
routine. If the ISR is coded in assembly language, it
must be terminated using a RETFIE instruction to
unstack the saved PC value, SRL value and old CPU
priority level.
DS39937B-page 80
Note:
Set the NSTDIS Control bit (INTCON1<15>) if
nested interrupts are not desired.
Select the user-assigned priority level for the
interrupt source by writing the control bits in the
appropriate IPCx register. The priority level will
depend on the specific application and type of
interrupt source. If multiple priority levels are not
desired, the IPCx register control bits for all
enabled interrupt sources may be programmed
to the same non-zero value.
Clear the interrupt flag status bit associated with
the peripheral in the associated IFSx register.
Enable the interrupt source by setting the
interrupt enable control bit associated with the
source in the appropriate IECx register.
Interrupt Setup Procedures
INITIALIZATION
INTERRUPT SERVICE ROUTINE
At a device Reset, the IPCx registers are
initialized, such that all user interrupt
sources are assigned to priority level 4.
Preliminary
7.4.3
A Trap Service Routine (TSR) is coded like an ISR,
except that the appropriate trap status flag in the
INTCON1 register must be cleared to avoid re-entry
into the TSR.
7.4.4
All user interrupts can be disabled using the following
procedure:
1.
2.
To enable user interrupts, the POP instruction may be
used to restore the previous SR value.
Only user interrupts with a priority level of 7 or less can
be disabled. Trap sources (level 8-15) cannot be
disabled.
The DISI instruction provides a convenient way to
disable interrupts of priority levels 1-6 for a fixed period.
Level 7 interrupt sources are not disabled by the DISI
instruction.
Push the current SR value onto the software
stack using the PUSH instruction.
Force the CPU to priority level 7 by inclusive
ORing the value OEh with SRL.
TRAP SERVICE ROUTINE (TSR)
INTERRUPT DISABLE
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