dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 288
dsp56800e
Manufacturer Part Number
dsp56800e
Description
16-bit Digital Signal Controller Core
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.DSP56800E.pdf
(706 pages)
- Current page: 288 of 706
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Instruction Pipeline
10-8
Pipeline
Int Arbitr
i = Interrupt Arbitration and Request
ii = Interrupt instruction word
ii0 = First word of JSR instruction
ii1 = Second word of JSR instruction
ii5 = RTI instruction
n = Normal instruction word
Int Req
Stage
OP2
EX2
AG
P1
P2
EX
ID
IF
n1 n2 n3 n4 ii0 ii1
1 2 3
n1 n2 n3 n4 ii0
n1 n2 n3 n4
i
n1 — —
4
i
Program
Main
n1 —
Interrupt Requests Sampled
n1
n2
5
Figure 10-2. Standard Interrupt Processing
n1
6
by the Arbiter
DSP56800E Core Reference Manual
—
n1
ii1
ii1
ii0
—
—
7
ii1
ii1
ii1
jsr
—
—
—
n1
8
(b) Interrupt Pipeline
(a) Instruction Flow
ii2
ii1
ii1
jsr
jsr
—
—
—
9
Return From
Jump Address (LBL)
Interrupt
Explicit
10 11 12
jsr
jsr
jsr
(RTI)
ii3
ii2
ii1
—
—
Vector Table
Interrupt
Instruction Cycle
JSR
jsr
jsr
jsr
jsr
ii4
ii3
ii2
—
ii5
ii4
ii3
ii2
jsr
jsr
jsr
—
13 14 15 16 17 18 19 20 21 22 23
ii5
ii4
ii3
ii2
jsr
jsr
—
•
jsr
ii5
ii4
ii3
ii2
—
•
•
ii4
ii3
ii2
—
rti
•
•
•
Subroutine
ii4
ii3
ii2
rti
rti
Interrupt
•
•
•
Routine
Interrupt
RTI
ii2
ii3
ii4
iin
ii4
ii3
rti
rti
rti
•
•
•
Freescale Semiconductor
ii4
rti
rti
rti
rti
•
•
•
—
rti
rti
rti
rti
•
•
•
n2
—
rti
rti
rti
rti
•
•
PC Resumes
Operation
n2
—
rti
rti
rti
rti
•
•
n2
—
rti
rti
rti
rti
•
•
n2
—
rti
rti
rti
•
•
•
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