MA240029 Microchip Technology, MA240029 Datasheet - Page 98

• Manufacturer Part Number: MA240029
• Description: Daughter Cards & OEM Boards PIC24FJ128GA310 Gen Purpose PIM
• Manufacturer: Microchip Technology

Specifications of MA240029

• Rohs: yes
• Product: Daughter Cards
• Core: PIC
• Description/function: Plug-in module
• Interface Type: I2C, SPI
• Tool Is For Evaluation Of: PIC24FJ128GA310
• For Use With: Explorer 16 Development Board

PIC24FJ128GA310 FAMILY
TABLE 8-2:
8.3
The PIC24FJ128GA310 family of devices implements
a total of 43 registers for the interrupt controller:
• INTCON1
• INTCON2
• IFS0 through IFS7
• IEC0 through IEC7
• IPC0 through IPC13, ICP15 and ICP16, ICP18
• INTTREG
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 (AIVT).
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.
DS39996F-page 98
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
through ICP23, ICP25 and ICP29
Interrupt Control and Status
Registers
Interrupt Source
IMPLEMENTED INTERRUPT VECTORS (CONTINUED)
Number
Vector
27
28
65
11
12
66
30
31
81
82
83
87
88
89
3
7
8
0000BAh
Address
00001Ah
00004Ah
00004Ch
00002Ah
00002Ch
0000B6h
0000B8h
0000C2h
0000C4h
0000C6h
000022h
000024h
000096h
000098h
000050h
000052h
IVT
Address
00014Ah
00014Ch
00012Ah
00012Ch
0001B6h
0001B8h
0001BAh
0001C2h
0001C4h
0001C6h
00011Ah
000122h
000124h
000196h
000198h
000150h
000152h
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.
The INTTREG register contains the associated
interrupt vector number and the new CPU interrupt
priority level, which are latched into the Vector
Number (VECNUM<6:0>) and the Interrupt Level
(ILR<3:0>) bit fields in the INTTREG register. The
new interrupt priority level is the priority of the
pending interrupt.
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the order of their vector numbers,
as shown in
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 IPL<2:0> bits
(SR<7:5>). These indicate the current CPU interrupt
priority level. The user can change the current CPU
priority level by writing to the IPL bits.
AIVT
Table
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>
Flag
8-2. For example, the INT0 (External
 2010-2011 Microchip Technology Inc.
Interrupt Bit Locations
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>
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>
IPC16<6:4>
IPC7<10:8>
IPC20<6:4>
IPC22<2:0>
IPC22<6:4>
IPC2<2:0>
IPC7<2:0>
IPC3<2:0>
Priority