GPIF 8/16/和32位差异

你好，
我有一个小疑问：当通过项目部分时，FX3芯片与32位GPIF或16位GPIF工作在100 MHz的时钟速率和最大传输速度为5Gbps。在100 MHz的32位是3.2 Gbps。那么，5 Gbps的速度究竟是如何达到的呢？由于这是并行通信，所以我假设没有编码。或者，5Gbps是数据从芯片的SS端口到USB连接器和主机的速率吗？
第二，对于16位和8位接口分别是否存在某种DDR或QDR以匹配32位芯片的GPIF速度，或者仅在1600 Gbps和仅800 Mbps下执行这些工作。
谢谢您！
穆耿汉



     以下为原文
  Hello,

I have a small query: When going through the project section, both the FX3 chips with 32 bit GPIF or with 16 bit GPIF work at a 100 MHz clock rate and max. transfer speed is 5Gbps. 32 bits at 100 MHz is ~ 3.2 Gbps. So how is the 5 Gbps speed arrived at in the first place ? Since this is parallel comms, i'm assuming that there is no encoding. Or is the 5Gbps is the rate at which the data goes out of the SS ports of the chip to the USB connector and to the Host ?


Secondly, is there some kind of DDR or QDR in place for the 16 and 8 bit interfaces respectively to match the GPIF speeds of the 32 bit chip or do these work only at 1600 Gbps and 800 Mbps only ?

Thank you !

Mugundhan