dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 156

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

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INTERRUPT CONTROL CYCLE 1
INTERRUPT CONTROL CYCLE 2
FETCH
DECODE
EXECUTE
INSTRUCTION CYCLE COUNT
i
ii
n = NORMAL INSTRUCTION WORD
= INTERRUPT
= INTERRUPT INSTRUCTION WORD
PROGRAM
MAIN
n1
n2
EXCEPTION PROCESSING STATE (INTERRUPT PROCESSING)
Figure 7-12 JSR Second Instruction of a Fast Interrupt
Freescale Semiconductor, Inc.
1
(a) Instruction Fetches from Memory
i
For More Information On This Product,
INTERRUPT SYNCHRONIZED AND
(b) Program Controller Pipeline
n1
2
i
RECOGNIZED AS PENDING
ii1
n1
3
PROCESSING STATES
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JSR
ii1
n1
4
FAST INTERRUPT
JSR
—
ii1
5
VECTOR
JSR
ii1
JSR
NOP
ii3
6
NOP
ii4
ii3
7
ii5
ii4
ii3
8
INTERRUPTS RE-ENABLED
ii5
ii4
9
10
ii6
ii5
iin
RTI
11
ii6
iin
LONG INTERRUPT
RTI
12
—
iin
SUBROUTINE
MOTOROLA
RTI
NOP
ii3
ii4
ii5
ii6
iin
n2
RTI
13
NOP n2
n2
14
15