PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 72
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PIC24FJ128GB
Manufacturer Part Number
PIC24FJ128GB
Description
64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC24FJ128GB.pdf
(328 pages)
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PIC24FJ256GB110 FAMILY
TABLE 6-2:
6.3
The PIC24FJ256GB110 family of devices implements
a total of 36 registers for the interrupt controller:
• INTCON1
• INTCON2
• IFS0 through IFS5
• IEC0 through IEC5
• IPC0 through IPC23 (except IPC14 and IPC17)
Global interrupt control functions are controlled from
INTCON1 and INTCON2. INTCON1 contains the Inter-
rupt Nesting Disable (NSTDIS) bit, as well as the
control and status flags for the processor trap sources.
The INTCON2 register controls the external interrupt
request signal behavior and the use of the Alternate
Interrupt Vector Table.
The IFSx registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit which is
set by the respective peripherals, or an external signal,
and is cleared via software.
The IECx registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
The IPCx registers are used to set the interrupt priority
level for each source of interrupt. Each user interrupt
source can be assigned to one of eight priority levels.
DS39897B-page 70
Timer1
Timer2
Timer3
Timer4
Timer5
UART1 Error
UART1 Receiver
UART1 Transmitter
UART2 Error
UART2 Receiver
UART2 Transmitter
UART3 Error
UART3 Receiver
UART3 Transmitter
UART4 Error
UART4 Receiver
UART4 Transmitter
USB Interrupt
Interrupt Control and Status
Registers
Interrupt Source
IMPLEMENTED INTERRUPT VECTORS (CONTINUED)
Number
Vector
27
28
65
12
66
30
31
81
82
83
87
88
89
86
11
3
7
8
IVT Address
0000BAh
00001Ah
00004Ah
00004Ch
00002Ah
00002Ch
0000B6h
0000B8h
0000C2h
0000C4h
0000C6h
0000C0h
000022h
000024h
000096h
000098h
000050h
000052h
Preliminary
00014Ch
00012Ch
0001BAh
0001C2h
0001C4h
0001C6h
0001C0h
Address
00011Ah
00014Ah
00012Ah
0001B6h
0001B8h
000122h
000124h
000196h
000198h
000150h
000152h
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the order of their vector numbers,
as shown in Table 6-2. For example, the INT0 (External
Interrupt 0) is shown as having a vector number and a
natural order priority of 0. Thus, the INT0IF status bit is
found in IFS0<0>, the INT0IE enable bit in IEC0<0>
and the INT0IP<2:0> priority bits in the first position of
IPC0 (IPC0<2:0>).
Although they are not specifically part of the interrupt
control hardware, two of the CPU control registers con-
tain bits that control interrupt functionality. The ALU
STATUS register (SR) contains the IPL2:IPL0 bits
(SR<7:5>). These indicate the current CPU interrupt
priority level. The user may change the current CPU
priority level by writing to the IPL bits.
The CORCON register contains the IPL3 bit, which,
together with IPL2:IPL0, indicates the current CPU
priority level. IPL3 is a read-only bit so that trap events
cannot be masked by the user software.
All interrupt registers are described in Register 6-1
through Register 6-38, in the following pages.
AIVT
IFS1<12>
IFS0<12>
IFS1<14>
IFS1<15>
IFS1<11>
IFS0<11>
IFS0<3>
IFS0<7>
IFS0<8>
IFS4<1>
IFS4<2>
IFS5<1>
IFS5<2>
IFS5<3>
IFS5<7>
IFS5<8>
IFS5<9>
IFS5<6>
Flag
Interrupt Bit Locations
© 2008 Microchip Technology Inc.
IEC1<11>
IEC1<12>
IEC0<11>
IEC0<12>
IEC1<14>
IEC1<15>
IEC0<3>
IEC0<7>
IEC0<8>
IEC4<1>
IEC4<2>
IEC5<1>
IEC5<2>
IEC5<3>
IEC5<7>
IEC5<8>
IEC5<9>
IEC5<6>
Enable
IPC20<14:12>
IPC21<14:12>
IPC0<14:12>
IPC1<14:12>
IPC6<14:12>
IPC2<14:12>
IPC16<10:8>
IPC7<14:12>
IPC20<10:8>
IPC21<10:8>
IPC16<6:4>
IPC7<10:8>
IPC20<6:4>
IPC22<2:0>
IPC22<6:4>
IPC2<2:0>
IPC7<2:0>
IPC3<2:0>
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