6-MHz Crystal Input or 48-MHz Clock

Sebastian Maile

Prodigy 30 points

Other Parts Discussed in Thread: TUSB2036, TUSB8040

Device: TPS2036

Do I have to use a 48-MHz Clock for USB2.0 or does it work also with a 6-MHz Crystal?

I try to built a USB2.0 Hub but it also works with USB1.1

over 13 years ago

0 Elias Villegas M. over 13 years ago

TI__Guru* 76130 points

Hello Sebastian,

Are you using the TUSB2036? If so, the answer is Yes, you can use a 6MHz crystal and you need to connect the terminal MODE to ground.

Regards.

0 Sebastian Maile over 13 years ago in reply to Elias Villegas M.

Prodigy 30 points

Yes I use the TUSB2036.

The hub do not support USB2.0

I attached my schematic

2185.Usb.pdf

0 Elias Villegas M. over 13 years ago in reply to Sebastian Maile

TI__Guru* 76130 points

Hello,

the TUSB2036 only supports Full-speed and Low-speed (USB 1.1)

Regards.

0 Sebastian Maile over 13 years ago in reply to Elias Villegas M.

Prodigy 30 points

I ordered this TUSB2036 as Hub for USB2.0. Do you have a solution for USB2.0 with smal changes in the PCB? Can I modify it for USB2.0? Regards

0 Elias Villegas M. over 13 years ago in reply to Sebastian Maile

TI__Guru* 76130 points

Hello Sebastian,

The tUSB2036 can not be modified to support High-Speed.

The HS traffic is controlled by the EHCI architecture and the FS/LS traffic is controlled by the UHCI/OHCI architecture. A USB 2.0 Host/Hub includes both.

You can use the TUSB8040 for SS and HS, below is the link to the device.

Regards.

http://www.ti.com/product/tusb8040

Interface

Interface forum

6-MHz Crystal Input or 48-MHz Clock