Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3321
| Posted: 12:50pm 27 Sep 2022 |
Just a schottky diode, cathode to pin, anode to pullup will do the same thing.
If you need to switch between DOUT and DIN reduce the pullup to 2k2 and put a 22k across the diode.
.
Edited 2022-09-27 23:00 by phil99