Interrupt Priority Registers (Iprc And Iprp); Interrupt Priority Register-Peripherals (Iprp) (X:$Fffffe) - Motorola DSP56303 User Manual

4.4.1

Interrupt Priority Registers (IPRC and IPRP)

There are two interrupt priority registers in the DSP56303. The IPRC (Figure 4-3) is
dedicated to DSP56300 core interrupt sources, and IPRP (Figure 4-4) is dedicated to
DSP56303 peripheral interrupt sources.
22
23
D5L1 D5L0
11 10
IDL2 IDL1 IDL0
Figure 4-3. Interrupt Priority Register-Core (IPRC) (X:$FFFFFF)
23 22 21
11 10 9
T0L1
Reserved bit; read as zero; should be written with zero for future compatibility
Figure 4-4. Interrupt Priority Register-Peripherals (IPRP) (X:$FFFFFE)
21 20 19 18
D4L1 D4L0 D3L1 D3L0
9 8 7 6
ICL2 ICL1 ICL0
20 19 18 17
7 6
8
T0L0 SCL1 SCL0 S1L1
Core Configuration
17 16 15 14
D2L1 D2L0 D1L1 D1L0
5 4 3 2
IBL2 IBL1 IBL0 IAL2
16 15 14
5 4 3 2
S1L0 S0L1 S0L0 HPL1
Configuring Interrupts
13 12
D0L1 D0L0
DMA0 IPL
DMA1 IPL
DMA2 IPL
DMA3 IPL
DMA4 IPL
DMA5 IPL
1 0
IAL1 IAL0
IRQA IPL
IRQA mode
IRQB IPL
IRQB mode
IRQC IPL
IRQC mode
IRQD IPL
IRQD mode
13 12
reserved
1 0
HPL0
HI08 IPL
ESSI0 IPL
ESSI1 IPL
SCI IPL
TRIPLE TIMER IPL
reserved
4-19