Timeline for Considerations when using internal pull-up/down resistors
Current License: CC BY-SA 3.0
19 events
| when toggle format | what | by | license | comment | |
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| Jan 14, 2017 at 18:53 | history | edited | Bence Kaulics |
added relevant tag
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| Nov 23, 2016 at 19:26 | comment | added | Whiskeyjack | @rev - Yeah that is a much better title that you suggested. Thanks. | |
| Nov 23, 2016 at 19:25 | history | edited | Whiskeyjack | CC BY-SA 3.0 |
changed title
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| Nov 23, 2016 at 19:15 | comment | added | Rev | @Whiskeyjack: You should consider changing the questions title. Maybe "Considerations when using internal pull-up/down resistors" or something like that. | |
| Nov 22, 2016 at 20:29 | comment | added | Whiskeyjack | @Passerby - Yeah you are right. Wrong choice of words on my part. | |
| Nov 22, 2016 at 18:23 | comment | added | Passerby | If you can't trust the pull up resistor in a microcontroller, you can't trust anything in that controller. What you want to know is if it's useful though | |
| Nov 22, 2016 at 16:31 | history | tweeted | twitter.com/StackElectronix/status/801100816740470787 | ||
| Nov 22, 2016 at 14:50 | answer | added | Richard | timeline score: 10 | |
| Nov 22, 2016 at 13:56 | answer | added | Scott Seidman | timeline score: 5 | |
| Nov 22, 2016 at 13:48 | comment | added | Jason S | @pjc50 you should have posted that as an answer, I didn't notice your comment until after I posted my answer. | |
| Nov 22, 2016 at 13:47 | answer | added | Jason S | timeline score: 14 | |
| Nov 22, 2016 at 11:05 | history | edited | Bence Kaulics |
added additional tags
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| Nov 22, 2016 at 10:22 | answer | added | Bence Kaulics | timeline score: 18 | |
| Nov 22, 2016 at 10:18 | comment | added | pjc50 | A little note: it may not function as a pullup while the microcontroller is resetting. So if there's external circuitry depending on it being pulled down all the time, you may have a problem at startup. If it's just being read by the micro, this is not a problem. | |
| Nov 22, 2016 at 10:05 | comment | added | Whiskeyjack | @Fake - Thanks. Looks like I can use it without any worries. My input is opto-isolated. | |
| Nov 22, 2016 at 10:03 | vote | accept | Whiskeyjack | ||
| Nov 22, 2016 at 9:50 | answer | added | Swanand | timeline score: 18 | |
| Nov 22, 2016 at 9:46 | comment | added | Bimpelrekkie | I use the internal pu/pd whenever I can and had no problems sofar. So unless you have a valid reason not to use the build-in pull up/down you can just use them. A reason not to rely on the internal pu/pd could be that the input has a long wire connected to it which might couple to other lines causing unexpected behavior. The internal pu/pd is quite weak (to save current) and is more easily disturbed than for example a 10 kohm resistor. | |
| Nov 22, 2016 at 9:41 | history | asked | Whiskeyjack | CC BY-SA 3.0 |