About frequency of USB2.0

Masato Miyashiro

Other Parts Discussed in Thread: OMAP-L138, OMAPL138

Hi,

My customer tries to connect OMAP-L138 and PC using USB2.0.
USB2.0 reference clock will be sourced from the AUXCLK of the system PLL.

Question is following;
1. Would USB0_REFCLKIN pin is opened OK?
2. In my customers use case, any USBCLK OK is in 12,24,48,19.2,38,4,13,26,20,40MHz?
Please tell me if there are any notes.

Best Regards,
Miyashiro

over 7 years ago

0 Shankari G over 7 years ago

TI__Mastermind 43955 points

Hi Miyashiro,
As per the OMAPL138 TRM and OMAPL138 LCDK schematics,
1) I think, it won't be any problem if you configure this pin (PINMUX) to some other peripheral like Audio (AIC_MCLK) pin.
2) Yes, you can use those frequencies for USB0_CLK (refer table7-4 in OMAPL138 TRM, page no 138)

0 Masato Miyashiro over 7 years ago in reply to Shankari G

Expert 1500 points

Hi Shankari,

Thanks for replying.
My question is resolved and I will answer to my customer.

Best Regards,
Miyashiro

0 Shankari G over 7 years ago in reply to Masato Miyashiro

TI__Mastermind 43955 points

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About frequency of USB2.0