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Could M483 disable VBUS function?

Posted: 06 Aug 2019, 13:55
by kine001
hi
we use M483 for a USB device, but now the host can't recognize the device

1, we connect the HSUSB_VBUS to 5V directly,
2, use external 24M HXT source

the problem is
in the initialization, after host reset device, the communication can't enter the descriptor query sequence, and M483 could not receive the interrupt for reset
could M483 connect VBUS to 5V directly all the time for USB device?
or how can I control the sequence for USB initialization?

Thanks.

Re: Could M483 disable VBUS function?

Posted: 06 Aug 2019, 14:40
by Dylan Hsieh
Hi,

1, we connect the HSUSB_VBUS to 5V directly
It's OK.

2, use external 24M HXT source
The M480 HSUSB clock source can only come from 12M HXT

Please repleace the HXT from 24M to 12M then download the simplest example [HSUSBD_HID_Mouse] in M480 BSP to check the hardware is fine first.

Thanks

Re: Could M483 disable VBUS function?

Posted: 09 Aug 2019, 17:03
by kine001
Thanks´╝î i will try it later

Re: Could M483 disable VBUS function?

Posted: 23 Aug 2019, 13:43
by kine001
It's ok when using 12M HXT, the usb initialization can run through.