Memory, Operating Modes, and Interrupts
Interrupt Priority Register
MOTOROLA
DSP56012 User’s Manual
3-15
3.6
INTERRUPT PRIORITY REGISTER
Interrupt priorities are determined in the 24-bit Interrupt Priority Register (IPR). The
Interrupt Priority Level (IPL) for each on-chip peripheral device and for two of the
external interrupt sources can be programmed, under software control, to one of
three maskable priority levels (IPL 0,1 or 2). IPLs are set by writing to the IPR. The
IPR configuration is shown in
Figure 3-6
.
• Bits 5–0 of the IPR are used by the DSP56000 core for two of the external
interrupt request inputs, IRQA (IAL [2:0]) and IRQB (IBL[2:0]); assuming the
same IPL, IRQA has higher a priority than IRQB.
• Bits 9–6 and 23–18 are reserved for future use.
• Bits 17–10 are available for determining IPLs for each peripheral (Host, SHI,
DAX, SAI). Two IPL bits are required for each peripheral interrupt group.
The interrupt priorities are shown in
Table 3-4
on page 3-16 and the interrupt
vectors are shown in
Table 3-5
on page 3-17.
Summary of Contents for DSP56012
Page 12: ...xii Motorola ...
Page 20: ...xx Motorola ...
Page 21: ...MOTOROLA DSP56012 User s Manual 1 1 SECTION 1 OVERVIEW ...
Page 40: ...1 20 DSP56012 User s Manual MOTOROLA Overview DSP56012 Architectural Overview ...
Page 41: ...MOTOROLA DSP56012 User s Manual 2 1 SECTION 2 SIGNAL DESCRIPTIONS ...
Page 61: ...SECTION 3 MEMORY OPERATING MODES AND INTERRUPTS ...
Page 81: ...MOTOROLA DSP56012 User s Manual 4 1 SECTION 4 PARALLEL HOST INTERFACE ...
Page 148: ...4 68 DSP56012 User s Manual MOTOROLA Parallel Host Interface Host Interface HI ...
Page 149: ...MOTOROLA DSP56012 User s Manual 5 1 SECTION 5 SERIAL HOST INTERFACE ...
Page 179: ...MOTOROLA DSP56012 User s Manual 6 1 SECTION 6 SERIAL AUDIO INTERFACE ...
Page 205: ...MOTOROLA DSP56012 User s Manual 7 1 SECTION 7 GPIO ...
Page 210: ...7 6 DSP56012 User s Manual MOTOROLA GPIO GPIO Register GPIOR ...
Page 211: ...MOTOROLA DSP56012 User s Manual 8 1 SECTION 8 DIGITAL AUDIO TRANSMITTER ...
Page 226: ...8 16 DSP56012 User s Manual MOTOROLA Digital Audio Transmitter DAX Programming Considerations ...
Page 233: ...MOTOROLA DSP56012 User s Manual B 1 APPENDIX B PROGRAMMING REFERENCE ...