Timeline for MCU pull down input push button with interrupt ESD issue
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 1, 2015 at 10:17 | vote | accept | www.jensolsson.se | ||
| Nov 6, 2015 at 12:28 | comment | added | richieqianle | Yes I care about the damage very much. Are you suggesting adding series resistors between input and the MCU pin? If internal diodes are sufficient, do you think protections on USART are necessary? | |
| Nov 6, 2015 at 12:13 | comment | added | Olin Lathrop | @rich: That depends on how much expense is worth how much lowered probability of erroneous behavior. A TVS or zener can lower the chance of damage if done right, if it's given some impedance to work against. If damage is all you want to prevent, then the protection diodes in the micro might be good enough. Again though, they need some impedance to work against. | |
| Nov 6, 2015 at 12:02 | comment | added | richieqianle | Nicely explained. May I have your opinion if we need TVS or schottky diodes or ESD suppressors in this case to prevent MCU from damaged by ESD? | |
| Jan 16, 2015 at 17:27 | history | answered | Olin Lathrop | CC BY-SA 3.0 |