dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 158
dsp56000
Manufacturer Part Number
dsp56000
Description
24-bit Digital Signal Processor Family Manual
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.DSP56000.pdf
(637 pages)
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FETCH
DECODE
EXECUTE
INSTRUCTION CYCLE COUNT
INTERRUPT CONTROL CYCLE 1
INTERRUPT CONTROL CYCLE 2
i
ii
n = NORMAL INSTRUCTION WORD
i% = INTERRUPT REJECTED
i = INTERRUPT INSTRUCTION
n = NORMAL INSTRUCTION
ADDITIONAL INTERRUPTS
NIZED AND RECOGNIZED
= INTERRUPT
= INTERRUPT INSTRUCTION WORD
INTERRUPT SYNCHRO-
DISABLED DURING
FAST INTERRUPT
RE-ENABLED
INTERRUPTS
AS PENDING
Figure 7-13 Interrupting an REP Instruction
Freescale Semiconductor, Inc.
For More Information On This Product,
PROGRAM
FETCHES
(a) Instruction Fetches from Memory
REP
(b) Program Controller Pipeline
MAIN
1
i
RESET PROCESSING STATE
n1 REP m
n2
n3
n4
n5
n6
INTERRUPT SYNCHRONIZED AND
RECOGNIZED AS PENDING
REP
PROCESSING STATES
i%
n2
2
Go to: www.freescale.com
REP
NOP
n3
3
NOP
n2
4
n2
n2
5
REPEAT
m TIMES
n2
n2
6
n2
n2
7
i
INTERRUPTS RE-ENABLED
n4
n3
n2
8
i
i1
i2
INSTRUCTION n2
REPLACED PER
THE REP INSTRUCTION
FAST INTERRUPT
SERVICE ROUTINE FETCHES
(FROM BETWEEN P:$0000
AND P:$003F)
n4
n3
ii1
9
n2
n4
10
ii2
ii1
n2
MOTOROLA
n2
n5
11
ii2
ii1
n2
n6
n5
12
ii2
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