2025-07-31 2:56 AM - edited 2025-07-31 2:57 AM
2025-07-31 7:05 AM
Grounding SDA or SCL will not hurt the chips, but it will prevent communication from taking place. SDA/SCL are driven with open drain, so pulling them down doesn't cause hardware issues.
Use a logic analyzer to see what's happening on the line.
2025-07-31 7:16 AM
With logic analyzer, after 5mins ground SCL, the chip randomly cannot response with IIC even remove SCL grounding.
No response could not recover even cold reboot the chip.
2025-07-31 7:18 AM
On recovering from I2C errors:
2025-07-31 7:30 AM
I wound like to confirm whether these 5min SCL grounding cause IIC slave(sensor) stuck?
2025-07-31 7:42 AM
For another abnormal behavior after 5mins grounding SLC, the axis data was incorrect, confirmed with logic analyzer.
When sensor was steady state on a horizontal surface, X-axis reached 1000mg. X-axis should be around 0mg.