On 4/2/20 3:43 PM, Pascal PAILLET-LME wrote: Hi,
[...]
No details on my side, it was a Pascal Paillet's direct feedback (Maintainer
of
STPMIC1 driver in Linux).
You can enable the active discharge on the STPMIC1's VBUSOTG. But, as
soon as a USB host peripheral (such as laptop) will attach and provide VBUS, there will be a ~8mA continuous power consumption on VBUS through this OTG active discharge. There is no functional issue behind this 8mA; but you need to know that 8mA is not compliant with the USB suspend constraint (2.5mA max).
So why is it in there ?
Sorry, I'm not sure to catch your point... The property is available because the stpmic1 Propose this feature (enable a pull down resistor when VBUS_OTG is disabled). We have Found during some test that it is better to not enable active discharge on vbus_otg. I hope it answers, pascal
Can you go into a bit more detail on what you found during your tests and why it was a problem ?