Spartan-6 FPGA SelectIO Resources User Guide 笔记3 Supply Voltages for the IOBs

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1.The VCCO supplies, one for each of the I/O banks

2.VCCINT is the main power supply for the internal FPGA logic

3.VCCAUX is an auxiliary（辅助） source of power used for various Spartan-6 FPGA functions

NOTE: The reference voltage VREF can be connected to multi-purpose VREF pins. All VREF inputs 

on a bank must be connected to the same voltage. 

Spartan-6 FPGA SelectIO Resources User Guide 笔记3 Supply Voltages for the IOBs

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原文地址：http://www.cnblogs.com/zheming/p/4655054.html