Hi, I have some questions concerning the tusb4020.
I have connected the tusb4020 with smbus to a host uC. Currently there is no USB Stack on the host. So, the tusb4020 runs as a standalone application.
I am wondering why the PWRCTL1 and PWRCTL2 Pin stay low.
I assumed that the PWRCTL pins are configureable by smbus or by the bootstrap pins. but after a lot of configuration trials I have not achieved this goal.
the configuration looks like this:
Tusb4020 Config Registers :
Vendor ID LSB (0x01): 51
Vendor ID MSB (0x02): 4
Product ID LSB (0x03): 25
Product ID MSB (0x04): 80
Device Configuration Register (0x05): 18
Battery Charging Support Register (0x06): 3
Device Removable Configuration Register (0x07): 3
Port Used Configuration Register (0x08): 3
Device Configuration Register 2 (0x0A): 22
Additional Feature Configuration Register (0xF0): 0
Battery Charging Support Register (0xF2): 0
Device Status and Command Register (0xF8): 1
But the power control is still low
Can I configure the power control pins by smbus?
Do you know how a configuration looks like?
Must a upstream communication be established from a USB stack?
Thanks a lot and best regards.
