Other Parts Discussed in Thread: CC1310, TPS3431, TPS3813, TPL5010
Hey guys,
we use the TIDA 00489. We noticed that our system sometimes crashes after a months of operation in the field and we were not able to trace the bug, though we assume it might be externally induced (vibration, mechanical stress, EMV). We want to use an automatic reset system without the necessity of user interference. When we open the sensor housing, we can short circuit the sensor to restart the system and the sensor works fine again, hence, we are thinking about implementing an external watchdog to detect such lockups and restart the CC1310. The watchdog should fullfil the following requirements:
- Cost around 50Cents
- Low power applicability (below 5µA). It should run with the 32kHz clock already running on the TIDA pcb.
- Watchdog window should be huge since it does not have to be fast, checking the system every 3hours would be sufficient
- Should be running on 3.3V (better between 2.0 - 3.7V)
- Small footprint with few peripherals
We actually really need an easy system. A watchdog waiting for a high edge every 2-3hrs and if not pulling the RST button of the CC1310 to GND would be sufficient. Something like a 5 pin chip with GND, Vcc, Clock Input, 1x input from CC1310 and 1x output connected to RST. The latter one driving RST to GND if necessary.
Best wishes
Slev1n