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关于UCD9240的咨询

Other Parts Discussed in Thread: UCD9240, PTD08A020W
制作一块V6的FPGA开发板时,用到了UCD9240芯片和PTD08A020W电源模块,发现UCD9240这个芯片上既有JTAG接口又有PMBUS接口。
1:请问这两个接口各有什么作用?如果仅用于给FPGA供电,是不是只需对PMBUS接口编程即可输出想要的电压,而JTAG接口可以不用管。
2:在焊接FPGA板时,是不是得先焊接电源模块,调试电源模块输出电压正确后,才可以焊接FPGA和其它芯片(以防芯片被烧毁)?
希望各位专家解答。