P1YVBUS如何在Explorer 16/32开发板上工作

我有一个关于P1YVBUS如何在Explorer 16/32开发板上工作的问题。我不是一个USB专家，但我花了大量的时间研究PIC32 MZ数据表和USB规范。我有USB连接器现在工作，但我必须断开UB-C VBUS（剪切迹线）和线P1YVBUS在PIM引脚1直接到J32 - 1。细节：1。从板顶部的PIM销1上切下痕迹。这是白色三角形Pi-1指示器附近的电线。2。在电路板背面从J32引脚1到PIM引脚1上布线一个跳线。注意/警告这也将P1YVBuSue移到这个新的VBUS上。我相信VBUS必须达到+5V，但是我没有找到足够的细节来说明VBUS是如何在PIC32 MZ USB模块内部使用的。我可以确认将它带到+5V让USB总线为我工作。在查看Explorer 16/32示意图（USB-C部分）时，我看到P1YVBUS通过二极管连接到+3.3V电源。这是在3.9V左右，所以我不知道它如何能达到+5V。有很多的选择与USB与遗产加上UB-C加上设备/主机模式，所以肯定有可能是电路细节我错过了。谁能揭示这应该如何工作？有人有车载USB工作吗？我知道有一个PICTUX USB适配器，但是USB接口A应该有我需要的一切。-克里



      以下为原文

    I have a question on how P1_VBUS is supposed to work on the Explorer 16/32 development board.  I'm not an expert on USB, but I have spent a good amount of timing studying the PIC32MZ datasheet and the USB specifications.

I have the USB-A connector working now, but I had to disconnect the USB-C VBUS (cut trace) and wire P1_VBUS at PIM pin 1 directly to J32-1.  Details:
1.  Cut trace from PIM pin 1 on top side of board.  It's the wire near the white triangle pin-1 indicator.
2.  Wire a jumper on back side of board from J32 pin 1 to PIM pin 1.
! Note/warning that this also moves P1_VBUS_E over to this new VBUS.

I believe that VBUS has to get to +5V, but I don't find enough details on how VBUS is used inside the PIC32MZ USB module to confirm.  I can confirm the bringing it to +5V got the USB bus working for me.

In looking at the Explorer 16/32 schematic (USB-C section) I see that P1_VBUS is connected through a diode to the +3.3V supply.  This clamps it at about 3.9V, so I don't see how it can ever get to +5V.  There are a lot of options with USB what with legacy plus USB-C plus device/host mode, so there certainly may be circuit details I've missed.

Can anyone shed light on how this should work?  Does anyone have the on-board USB working as-is?  I understand there is a PicTail USB adapter, but the USB-A port should have everything I need.

- Kerry