参数资料
型号: AT32UC3A3-XPLD
厂商: Atmel
文件页数: 16/94页
文件大小: 0K
描述: KIT DEV/EVAL FOR AT32UC3A3
产品培训模块: AVR® UC3 Introduction
Sensors Xplained
标准包装: 1
系列: AVR®32 UC3-A3 Xplained
类型: MCU
适用于相关产品: AT32UC3A3
所含物品:
23
32072SH–AVR32–10/2012
AT32UC3A3
Figure 4-1.
Overview of the AVR32UC CPU
4.3.1
Pipeline Overview
AVR32UC has three pipeline stages, Instruction Fetch (IF), Instruction Decode (ID), and Instruc-
tion Execute (EX). The EX stage is split into three parallel subsections, one arithmetic/logic
(ALU) section, one multiply (MUL) section, and one load/store (LS) section.
Instructions are issued and complete in order. Certain operations require several clock cycles to
complete, and in this case, the instruction resides in the ID and EX stages for the required num-
ber of clock cycles. Since there is only three pipeline stages, no internal data forwarding is
required, and no data dependencies can arise in the pipeline.
Figure 4-2 on page 24 shows an overview of the AVR32UC pipeline stages.
AVR32UC CPU pipeline
Instruction memory controller
High
Speed
Bus
master
MPU
H
igh
S
pee
d
Bu
s
H
igh
S
pee
d
Bu
s
OCD
system
OC
D
in
te
rfa
ce
In
te
rru
pt
c
on
tro
lle
ri
nte
rfa
ce
High
Speed
Bus slave
H
igh
S
pee
d
Bu
s
Da
ta
RA
M
in
te
rfa
ce
High Speed Bus master
Power/
Reset
control
Re
se
ti
nt
er
fa
ce
CPU Local
Bus
master
CPU
L
oc
al
B
us
Data memory controller
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