dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 290
dsp56800e
Manufacturer Part Number
dsp56800e
Description
16-bit Digital Signal Controller Core
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.DSP56800E.pdf
(706 pages)
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Instruction Pipeline
10-10
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 = RTID instruction
di = Instruction in RTID delay slot
n = Normal instruction word
Int Req
Stage
OP2
EX2
AG
P1
P2
EX
ID
IF
n1 n2 n3 n4 ii0 ii1
1 2
n1 n2 n3 n4 ii0
n1 n2 n3 n4
3
i
n1 — —
4
i
Program
Main
n1 —
Interrupt Requests Sampled
n1
n2
5
Figure 10-3. Execution of the RTID Instruction
n1
6
by the Arbiter
DSP56800E Core Reference Manual
n1
ii1
ii1
ii0
—
—
—
7
n1
ii1
ii1
ii1
jsr
—
—
—
8
(b) Interrupt Pipeline
(a) Instruction Flow
jsr
jsr
ii2
ii1
ii1
—
—
—
9
Jump Address (LBL)
Return From
Interrupt
Explicit
(RTID)
10 11
ii3
ii2
ii1
jsr
jsr
jsr
—
—
Vector Table
Interrupt
Instruction Cycle
JSR
ii4
ii3
ii2
jsr
jsr
jsr
jsr
—
12 13 14
ii5
ii4
ii3
ii2
jsr
jsr
jsr
—
di0
jsr
jsr
ii5
ii4
ii3
ii2
—
di1
di0
ii5
ii4
ii3
ii2
jsr
—
rtid rtid rtid rtid rtid di0 di1 di2 n2
15 16 17 18 19 20 21 22 23
di2
di1 di2
di0 di1 di2
ii4
ii3
ii2
—
rtid rtid rtid rtid rtid di0 di1 di2
ii4 rtid rtid rtid rtid rtid di0 di1
ii3
ii2
Subroutine
•
Interrupt
RTID
di0
di1
di2
ii2
ii3
iin
ii4 rtid rtid rtid rtid rtid di0
ii3
•
•
Freescale Semiconductor
ii4
•
•
•
—
•
•
•
n2
—
PC Resumes
Operation
Interrupt
•
•
Routine
n2
—
•
•
n2
—
•
•
—
•
•
•
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