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56F8355_07 Datasheet, PDF (96/164 Pages) Freescale Semiconductor, Inc – 16-bit Digital Signal Controllers
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5.6.12 Fast Interrupt 0 Match Register (FIM0)
Base + $B
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Read
Write
0
0
0
0
0
0
0
0
0
FAST INTERRUPT 0
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 5-14 Fast Interrupt 0 Match Register (FIM0)
5.6.12.1 Reserved—Bits 15–7
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
5.6.12.2 Fast Interrupt 0 Vector Number (FAST INTERRUPT 0)—Bits 6–0
This value determines which IRQ will be a Fast Interrupt 0. Fast interrupts vector directly to a service
routine based on values in the Fast Interrupt Vector Address registers without having to go to a jump table
first; see Part 5.3.3. IRQs used as fast interrupts must be set to priority level 2. Unexpected results will
occur if a fast interrupt vector is set to any other priority. Fast interrupts automatically become the
highest-priority level 2 interrupt, regardless of their location in the interrupt table, prior to being declared
as fast interrupt. Fast Interrupt 0 has priority over Fast Interrupt 1. To determine the vector number of each
IRQ, refer to Table 4-5.
5.6.13 Fast Interrupt 0 Vector Address Low Register (FIVAL0)
Base + $C
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Read
Write
FAST INTERRUPT 0
VECTOR ADDRESS LOW
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 5-15 Fast Interrupt 0 Vector Address Low Register (FIVAL0)
5.6.13.1 Fast Interrupt 0 Vector Address Low (FIVAL0)—Bits 15–0
The lower 16 bits of the vector address are used for Fast Interrupt 0. This register is combined with
FIVAH0 to form the 21-bit vector address for Fast Interrupt 0 defined in the FIM0 register.
5.6.14 Fast Interrupt 0 Vector Address High Register (FIVAH0)
Base + $D
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Read
Write
0
0
0
0
0
0
0
0
0
0
0
FAST INTERRUPT 0
VECTOR ADDRESS HIGH
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 5-16 Fast Interrupt 0 Vector Address High Register (FIVAH0)
56F8355 Technical Data, Rev. 12
96
Freescale Semiconductor
Preliminary
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