Hi,
I am trying to develop a custom USB-C based sensor accessory device for phones and tablets.
Overview :
- 1 x USB-C male plug that will directly connect to a tablet, the accessory device will get power from the tablet, and a STM32F411 will send connected sensor data via USB 2.0 lines.
- 1 x USB-C receptacle, that will be used to charge the tablet (with PD negotiations, up to 100W) when a PD charger is connected to it. It will also send the sensor data while it is charging the tablet.
- For USB-C PD negotiations I need a standalone controller that doesn't require any firmware.
I did some research and learned that I must implement a DRP to do this and I learned about STUSB1602.
Question:
- For the male USB-C plug the CC1, and CC2 lines are CC and VCON can I connect the CC and VCON to the CC1 and CC2 lines?
- Do I need the dead battery feature for my application?
- Can up to 100W PD be achieved using only CC1 and CC2?
My concept drawing is attached and I need help from the community to ensure that it will work or not.
Thanks
Subhadeep
