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关于TIDA-01226参考原理图的疑问(5)

Other Parts Discussed in Thread: TIDA-01226

您好!

TIDA-01226参考原理图中,

在一些通信、时钟线路上统一使用了30.1Ω 1%的高精度电阻,这是有什么特殊要求吗?

另外,USB相关回路中,U44(TXS0102-DCU)跨接在I2C总线上,两侧电源都是3.3V,无需转换电平,

是否可以不安装U44,而直接将两侧I2C线路短接(安装R658/R660)?