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有关TMS570LS31开发板

您好!

 

想问下,该板子的中用到芯片 SN74CBT16214DGGR ,其数据手册中,我没有看懂其具体作用。能帮忙说说该芯片的具体作用吗?

 

此外手册中有个功能表,没看懂。如当S2=H,S1=H,S0=L时,A port = B1 port,这是什么意思?是说A接口的相应位和接口B1相应位相连吗?