After tusb8041 is powered on, pin 50 is at high level. When pin 50 is short circuited to ground, USB device identification can be started.
Figure 1 is tusb8041, figure 2 is MCU, figure 3 is 3.3V and 1.1V power supply; Figure 4 is waveform of 3.3V and 1.1V power supply,
I have done the following tests: 1, 3.3V and 1.1V are powered on at the same time; 2, 1.1V is powered on first and then 3.3V is powered on first; 3, 3.3V is powered on first and then 1.1V is powered on; but it is still powered on and does not start. The 3.3V and 1.1V power chips we use are the same as evmiout parameter Xia. Please help to analyze the reason.