Apr 19, 2017
01:27 PM
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Apr 19, 2017
01:27 PM
In our custom implementation of the FX3 chip, we are using it as a device. We have VBATT connected to 3.3V through a 0 ohm resistor, and the VBUS pin connected to the voltage line of the USB connector through an overvoltage protection in a similar manner to the dev board. The documentation states that when both are connected, the VBUS line is used by defatult.
My first question is, if the VBUS line loses power, will the chip switch to the VBATT for power?
Second question is, what happens to the internal operation of the chip if VBUS is power cycled? Is anything reset? We have all other I/O and core voltages powered internally.
Thanks
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