Other Parts Discussed in Thread: TUSB320, TUSB321
Tool/software:
I am considering configuring a DFP and DRP port using TUSB321AI.
I am trying to turn on the output of USB bus power by monitoring the ID pin of TUSB321AI with a microcontroller.
In this case, I am considering whether there will be a collision of USB bus power with the connected USB TYOE-C device.
① The other side is a device that implements a CC controller that complies with TYPE-C.
In this case, if the other side is a UFP, the ID pin will be asserted LOW and it is thought that bus power output is possible.
If the other side wins the DFP or DRP source first, the ID pin will not be asserted LOW and bus power will not be output.
② If the other side is a legacy AC adapter that implements Rp and always outputs bus power, the ID pin will not be asserted even if it is connected and bus power will not be output.
③ If the other side is a legacy AC adapter that does not implement Rp and always outputs bus power, the ID pin will not be asserted even if it is connected
(it will be determined to be unconnected) and bus power will not be output.
With this in mind, can we assume that there will be no bus power conflicts?
Tank you