DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 76

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Core Configuration
4.4.3 Processing 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 with the same IPL are
pending, another fixed-priority structure within that IPL determines which interrupt source is
serviced first. Table 4-6 shows this fixed-priority list of interrupt sources within an IPL, from
highest to lowest at each level The interrupt mask bits in the Status Register (I[1–0]) can be
programmed to ignore low priority-level interrupt requests.
4-18
Starting Address
Interrupt
VBA:$4C
VBA:$5C
VBA:$FE
VBA:$44
VBA:$46
VBA:$48
VBA:$4A
VBA:$4E
VBA:$50
VBA:$52
VBA:$54
VBA:$56
VBA:$58
VBA:$5A
VBA:$5E
VBA:$60
VBA:$62
VBA:$64
VBA:$66
:
Priority
Highest
Priority Level
Interrupt
Table 4-6. Interrupt Source Priorities Within an IPL
Range
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
0–2
:
Hardware RESET
Stack error
Table 4-5. Interrupt Sources (Continued)
ESSI1 receive last slot
ESSI1 transmit data
ESSI1 transmit data with exception status
ESSI1 transmit last slot
Reserved
Reserved
SCI receive data
SCI receive data with exception status
SCI transmit data
SCI idle line
SCI timer
Reserved
Reserved
Reserved
Host receive data full
Host transmit data empty
Host command (default)
Reserved
:
Reserved
DSP56303 User’s Manual, Rev. 2
Level 3 (nonmaskable)
Interrupt Source
Interrupt Source
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