dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 139

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

with the same IPL are pending, a second fixed-priority structure within that IPL deter-
mines which interrupt the processor will service. The fixed priority of interrupts within an
IPL and the interrupt enable bits for all interrupts are shown in Table 7-5.
7.3.3 Interrupt Sources
Interrupts can originate from any of the vector addresses listed in Table 7-6, which
shows the corresponding interrupt starting address for each interrupt source. These
addresses are located in the first 64 locations of program memory.
MOTOROLA
Table 7-3 Interrupt Priority Level Bits
xxL1
0
EXCEPTION PROCESSING STATE (INTERRUPT PROCESSING)
xxL0
Table 7-5 Central Processor Interrupt Priorities Within an IPL
0
Priority
Highest
Lowest
Higher
Lower
Enabled
Freescale Semiconductor, Inc.
Hardware RESET
III
NMI
Stack Error
Trace
SWI
IRQA (External Interrupt)
IRQB (External Interrupt)
No
For More Information On This Product,
Exception
PROCESSING STATES
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Levels 0, 1, 2 (Maskable)
Level 3 (Nonmaskable)
IPL
—
IRQA Mode Bits
IRQB Mode Bits
Enabled By
Table 7-4 External Interrupt
—
—
—
—
—
—
0 and 1
3 and 4
Bit No.
—
—
—
—
—
—
Address
Memory
X Data
$FFFF
$FFFF
—
—
—
—
—
—
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