| ??? 05/13/05 10:45 Read: times |
#93383 - reset...... Responding to: ???'s previous message |
Reset circuit
I have kept options: On shorting a jumper my reset is connected to a simple RC and while on shorting to the other jumper reset is connected to a watchdog circuit of a monostable multivibrator of 74HC123 Which micro controller you are using? MSC1210Y5 from TI (8051 core) Have you seen what happens on +5V line and Reset with an oscilloscope? Yes, there is no noticeable spike on the analog and digital power supply when observed on a CRO. But when I put an inductor (ferrite bead) as mentioned in FAQ along with a 0.1microFarad Cap, the problem was solved. Brownout Level Select is set in such a way that Brownout reset occur only if supply goes below 2.5V. Now since this instrument is to be used in Industries, it should have good noise resistance. To check this by placing a contactor near my controller and switching it. It was giving reset on every switching of the contactor. What else can be done to solve this problem……..? The controller resets due to spike radiated or conducted…. I checked the watchdog by removing it and putting a simple RC at the Reset….But still the controller resets on switching of the contactor…. i am not able to send pictures..how do i do that.? |
| Topic | Author | Date |
| Analog design.. | 01/01/70 00:00 | |
| FAQ | 01/01/70 00:00 | |
| Bad grounf | 01/01/70 00:00 | |
| Reset Problem. | 01/01/70 00:00 | |
| Reset? | 01/01/70 00:00 | |
| how | 01/01/70 00:00 | |
| Reset... | 01/01/70 00:00 | |
| why, oh why | 01/01/70 00:00 | |
| RC...... | 01/01/70 00:00 | |
| what do you maan | 01/01/70 00:00 | |
| All ? | 01/01/70 00:00 | |
| reset...... | 01/01/70 00:00 | |
| I use........ | 01/01/70 00:00 | |
| Re:Analog design.. | 01/01/70 00:00 | |
| ground loop.. | 01/01/70 00:00 | |
| Re: Ground loop | 01/01/70 00:00 | |
| get the clamps! | 01/01/70 00:00 | |
| Ground/earth leakage | 01/01/70 00:00 | |
| Smps | 01/01/70 00:00 | |
| We need much more details! | 01/01/70 00:00 | |
| Layout.. | 01/01/70 00:00 | |
| Hmmmmmmm | 01/01/70 00:00 | |
| Ground plane, connectors | 01/01/70 00:00 | |
| Ahh | 01/01/70 00:00 | |
| A B-Field Probe? | 01/01/70 00:00 | |
I am fortunate | 01/01/70 00:00 |