Table 4-4 Interrupt Source Priorities Within An Ipl - Motorola DSP56309 User Manual

Core Configuration
Interrupt Sources and Priorities
4.4.3 Interrupt Source Priorities Within an IPL
If more than one interrupt request is pending when an instruction executes, the interrupt
source with the highest IPL is serviced first. When several interrupt requests having the
same IPL are pending, another fixed-priority structure within that IPL determines which
interrupt source is serviced first. This fixed priority list of interrupt sources within an
IPL is shown in Table 4-4.

Table 4-4 Interrupt Source Priorities within an IPL

Priority
Highest
Ñ
Ñ
Ñ
Ñ
Lowest
Highest
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
4-14
Level 3 (Nonmaskable)
Hardware RESET
Stack Error
Illegal Instruction
Debug Request Interrupt
Trap
Non-Maskable Interrupt
Levels 0, 1, 2 (Maskable)
IRQA (External Interrupt)
IRQB (External Interrupt)
IRQC (External Interrupt)
IRQD (External Interrupt)
DMA Channel 0 Interrupt
DMA Channel 1 Interrupt
DMA Channel 2 Interrupt
DMA Channel 3 Interrupt
DMA Channel 4 Interrupt
DMA Channel 5 Interrupt
DSP56309UM/D
Interrupt Source
MOTOROLA