ARM Cortex-M3 Manual do Utilizador descarregar pdf (Página 27)



Cortex

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

Stage

Fetch

Stage

Decode

Stage

Execute

Execute stage branch (ALU branch & Load Store Branch)

Fetch

(Prefetch)

AGU

Instruction

Decode &

Branch

Address

Phase & Write

Back

Data Phase

Load/Store &

Branch

Multiply & Divide

Shift

ALU & Branch

Write

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ARM Cortex-M3 Manual do Utilizador Página 27