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APB, AHB, AXI 3, AXI 4 的区别是什么？
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APB, AHB, AXI 3, AXI 4 的区别是什么？
Offline
Jenny Su 苏琴
over 9 years ago
georgewang
chuxuezheng
luwenjin
malei
Top replies
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ct
over 9 years ago
+1
verified
APB是双cycle设计，只有一半的cycle在传数据，设计简单，一般用来连接吞吐量需求较低配置端口，不过在ARM总线内部都会转成AXI来传输。AHB算是三通道协议，分别是读写数据和地址通道，读写共用一个地址通道，所以吞吐量也不是很理想，但是设计简单，cortex m0就是ahb的，还有很多legacy device采用ahb， ahb在ARM总线内部也是转成AXI传输和仲裁。AXI的是5通道设计的...