Part Number: AWR2944EVM
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有的IO pin,可以支持1.8V和3.3V两种电压。 这些IO的电压标准采用1.8V还是3.3V,是靠配置寄存器 进行电压标准的切换,还是IO本身做了硬件自适应。
是硬件上支持1.8v, 3.3v双电压,不需要软件配置。
3.3V标准下, 1.6V以上是高电平,对应逻辑1, 1.8V标准下, 0.9V以上就是高电平,对应逻辑1
对应的VIH, VIL, VOH, VOL电平,请看数据手册第36页。
7.4 Recommended Operating Conditions
https://www.ti.com/lit/ds/symlink/awr2944.pdf