unkzo
Posts: 49
Joined: Mon May 06, 2013 11:38 pm

Get the UART PL011 without PULL-UP on TX

Wed Mar 09, 2016 11:03 pm

If for some reason i want to use a external pull-up on TX and disable the internal pull-up for UART (PL011), there is a easy way after boot or i need to try use the Device Tree blob ? I know it's possible change de pull-up of RX after booting, but i can't do it on TX pin with ALT0 active even writing directly to registers.

lb
Posts: 232
Joined: Sat Jan 28, 2012 8:07 pm

Re: Get the UART PL011 without PULL-UP on TX

Wed Mar 09, 2016 11:15 pm

The interal pull-up is quite weak. If you want to add a (stronger) external pull-up, you can probably ignore the internal one. It doesn't matter.

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