What to do with unused XOSC pins?

Jeff McDevitt

Other Parts Discussed in Thread: TM4C123GH6PM

As I understand it, the XOSC0 and XOSC1 pins are only used for the Hibernation model. I am not using that so I am wondering what to do with the pins. I am guessing that I should ground XOSC0 and leave XOSC1 unconnected. Also, does the GNDX pin need to be connected?

The data sheet or the Design Guide does not cover this scenario.

Thanks!

over 11 years ago

0 Markel Robregado over 11 years ago

Guru 86745 points

Hi Jeff,

There is a table at your device datasheet on what to do with unused pins. At the datasheet of tm4c123gh6pm the recommended connections for XOSC0 and XOSC1 are as below

1. Both, XOSC0 and XOSC1 Not Connected - Acceptable Practice

2. XOSC0 connected to GND and XOSC1 Not Connected - Preferred Practice

-kel