topic Re: PCF2129 SDO and CLKOUT in Other NXP Products

PCF2129 SDO and CLKOUT

mlibhart — Tue, 14 Feb 2017 21:44:37 GMT

Really simple question from a hobbyist. Is it ok to let SDO (serial data out) and the clkout float on the PCF2129 RTC if I'm not using either, or should they be tied one way or the other? I'll be using I2C so don't need the SDO.

Thanks.

Re: PCF2129 SDO and CLKOUT

TomasVaverka — Fri, 17 Feb 2017 21:28:27 GMT

Hi Matthew,

The SDO and CLKOUT pins of the PCF2129 device are output functions. It is okay to leave output pins floating.

Best regards,

Tomas

Re: PCF2129 SDO and CLKOUT

mlibhart — Wed, 22 Feb 2017 12:42:55 GMT

Hi Tomas,

Thanks so much for the quick reply. Really appreciate it.

Re: PCF2129 SDO and CLKOUT

fatihozen — Mon, 04 Mar 2019 11:56:11 GMT

Hi, I have similar question, I won't use TS, SDO, INT and CLKOUT pins and ESD protection is very important on my side. What do you suggest for these pins connections ? I think it is better choice to connect them somewhere via resistors than letting float, but I need an advice here.