ARM Cortex-M3 Manual de usuario Pagina 27

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27
-
M3 has 3
-
stage fetch
-
decode
-
execute pipeline
Similar to ARM7
Cortex
-
M3 does more in each stage to increase overall
performance
Cortex
-
M3 Pipeline
Branch forwarding & speculation
1
st
Stage
-
Fetch
2
nd
Stage
-
Decode
3
rd
Stage
-
Execute
Execute stage branch (ALU branch & Load Store Branch)
Fetch
(Prefetch)
AGU
Instruction
Decode &
Register Read
Branch
Address
Phase & Write
Back
Data Phase
Load/Store &
Branch
Multiply & Divide
Shift
ALU & Branch
Write
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