This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TM4C1299NCZAD: GNDX connection

Part Number: TM4C1299NCZAD

I want to know if GNDX of TM4C1299 connect to GND(digital GND)? The EVB circuit show that GNDX just connects to two caps of Y2/Y3.

But the spec shows GNDX needs to connect to GND as well

  • The GNDX pin is connected internally to GND close to the oscillator buffer. While the datasheet mentions that GNDX should be connected to GND externally, we have found a slight improvement in crystal startup and noise immunity if GNDX is only connected to the external capacitors. Therefore the current recommendation is to use the circuit like the evaluation board and only connect to the bypass capacitors. The difference is so small that we do not recommend changing existing hardware.