56F8322 Techncial Data, Rev. 10.0
72 Freescale Semiconductor
Preliminary

5.6.14.2 Fast Interrupt 0 Vector Address High (FIVAH0)—Bits 4–0

The upper five bits of the vector address used for Fast Interrupt 0. This register is combined with FIVAL0
to form the 21-bit vector address for Fast Interrupt 0 defined in the FIM0 register.
5.6.15 Fast Interrupt 1 Match Register (FIM1)
Figure 5-17 Fast Interrupt 1 Match Register (FIM1)

5.6.15.1 Reserved—Bits 15–7

This bit field is reserved or not implemented. It is read as 0, but cannot be modified by writing.

5.6.15.2 Fast Interrupt 1 Vector Number (FAST INTERRUPT 1)—Bits 6–0

This value determines which IRQ will be a Fast Interrupt 1. 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 Section 5.3.3 for details. 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 4-3.
5.6.16 Fast Interrupt 1 Vector Address Low Register (FIVAL1)
Figure 5-18 Fast Interrupt 1 Vector Address Low Register (FIVAL1)

5.6.16.1 Fast Interrupt 1 Vector Address Low (FIVAL1)—Bits 15–0

The lower 16 bits of the vector address used for Fast Interrupt 1. This register is combined with FIVAH1
to form the 21-bit vector address for Fast Interrupt 1 defined in the FIM1 register.
5.6.17 Fast Interrupt 1 Vector Address High Register (FIVAH1)
Figure 5-19 Fast Interrupt 1 Vector Address High Register (FIVAH1)
Base + $E 15 14 13 12 11 10 9876543210
Read 000000000 FAST INTERRUPT 1
Write
RESET 0000000000000000
Base + $F 15 14 13 12 11 10 9876543210
Read FAST INTERRUPT 1 VECTOR
ADDRESS LOW
Write
RESET 0000000000000000
Base + $10 15 14 13 12 11 10 9876543210
Read 00000000000 FAST INTERRUPT 1
VECTOR ADDRESS HIGH
Write
RESET 0000000000000000