dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 147

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

MOTOROLA
INTERRUPT CONTROL CYCLE 1
INTERRUPT CONTROL CYCLE 2
FETCH
DECODE
EXECUTE
INSTRUCTION CYCLE COUNT
i
ii
II = ILLEGAL INSTRUCTION
n = NORMAL INSTRUCTION WORD
= INTERRUPT
= INTERRUPT INSTRUCTION WORD
TRACE BIT
SET IN SR
EXCEPTION PROCESSING STATE (INTERRUPT PROCESSING)
PROGRAM
FETCHES
MAIN
n1
n2
1
i
Freescale Semiconductor, Inc.
INTERRUPT SYNCHRONIZED AND
n1
2
i
(a) Instruction Fetches from Memory
For More Information On This Product,
RECOGNIZED AS PENDING
NOP
n1
3
(b) Program Controller Pipeline
Figure 7-7 Trace Exception
NOP
NOP
n1
4
PROCESSING STATES
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NEXT TRACE
OPERATION
NOP
NOP
NOP
5
NOP
NOP
JSR
6
NOP
JSR
—
7
NOP
JSR
TRACE PROGRAM
8
TRACE INSTRUCTION n1
NOP
TRACE PROGRAM
9
NOT USED
DEBUGGER
PROGRAM
TRACE PROGRAM
NOP
NOP
NOP
JSR
RTI
10
RTI
11
INTERRUPT SYNCHRONIZED AND
RTI
—
12
RECOGNIZED AS PENDING
THREE NOP
INSTRUCTIONS INSERTED
BY TRACE MODE
FAST INTERRUPT
CAUSED BY TRACE
INTERRUPT
SET TRACE BIT IN SSL
NOP
RTI
n2
13
i
NOP NOP NOP
NOP
n2
14
NOP NOP
15
n2
i
NOP
16
NOP
NOP
17
7 - 23
NOP
18