I have the following question:
who does initiate the USB communication (enumeration?)?
does it the device as soon it gets 5V?
or is it the host as soon it sees load on 5V line?
I hunch is that it is the device, but I would like to have confirmation from someone knowledgeable.
Reason for question:
I have only 4 wires to allow the Device (T3.6) to receive power from 14V battery pack and comunicate with host (on different battery back)
T3.6 is powered with 6V (from DC/DC converter)
I could use Serial or USB for communication
Serial no issue
USB: convert 6V (VIN) to 5V (VUSB) (2 diodes ?) and have data-only (D+ , D-, GND) connection to host
USB solution only could work if device (T3.6) is initiation communication, as host will not see load on 5V.
@Paul, I know USB is complex, but ….
who does initiate the USB communication (enumeration?)?
does it the device as soon it gets 5V?
or is it the host as soon it sees load on 5V line?
I hunch is that it is the device, but I would like to have confirmation from someone knowledgeable.
Reason for question:
I have only 4 wires to allow the Device (T3.6) to receive power from 14V battery pack and comunicate with host (on different battery back)
T3.6 is powered with 6V (from DC/DC converter)
I could use Serial or USB for communication
Serial no issue
USB: convert 6V (VIN) to 5V (VUSB) (2 diodes ?) and have data-only (D+ , D-, GND) connection to host
USB solution only could work if device (T3.6) is initiation communication, as host will not see load on 5V.
@Paul, I know USB is complex, but ….