dsp56800eerm Freescale Semiconductor, Inc, dsp56800eerm Datasheet - Page 100

• Manufacturer Part Number: dsp56800eerm
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

5.6.15.1
This bit field is reserved or not implemented. It is read as 0, but cannot be modified by writing.
5.6.15.2
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
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
5.6.16
5.6.16.1
The lower 16 bits of vector address are 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
5.6.17.1
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
5.6.17.2
The upper five bits of vector address are used for Fast Interrupt 1. This register is combined with FIVAL1
to form the 21-bit vector address for Fast Interrupt 1 defined in the FIM1 register.
100
Base + $10
Base + $F
RESET
RESET
Write
Write
Read
Read
Part
Fast Interrupt 1 Vector Address Low Register (FIVAL1)
Fast Interrupt 1 Vector Address High Register (FIVAH1)
Reserved—Bits 15–7
Fast Interrupt 1 Vector Number (FAST INTERRUPT 1)—Bits 6–0
Fast Interrupt 1 Vector Address Low (FIVAL1)—Bits 15–0
Figure 5-19 Fast Interrupt 1 Vector Address High Register (FIVAH1)
Reserved—Bits 15–5
Fast Interrupt 1 Vector Address High (FIVAH1)—Bits 4–0
Figure 5-18 Fast Interrupt 1 Vector Address Low Register (FIVAL1)
Table
5.3.3. IRQs used as fast interrupts must be set to priority level 2. Unexpected results will
15
15
0
0
0
4-5.
14
14
0
0
0
13
13
0
0
0
12
12
0
0
0
56F8357 Technical Data, Rev. 15
11
11
0
0
0
10
10
0
0
0
VECTOR ADDRESS LOW
9
0
9
0
0
FAST INTERRUPT 1
8
0
8
0
0
7
7
0
0
0
6
6
0
0
0
5
0
5
0
0
4
4
0
0
VECTOR ADDRESS HIGH
FAST INTERRUPT 1
3
3
0
0
Freescale Semiconductor
2
0
2
0
1
0
1
0
Preliminary
0
0
0
0