cancel
Showing results for 
Search instead for 
Did you mean: 

USB Superspeed Peripherals

Anonymous
Not applicable

Hi~

   


I used a clock frequency of 19.2Mhz which was referenced in the datasheet and set the Load Cap value to 12pF.
However, video transmission / reception error via USB3.0 frequently occurs.
I set the Load Cap value to a larger value of 27pF, which resulted in fewer errors.
According to Datasheet, it should be set to 13.5pF, but now it is used as 27pF.
1) Is there a problem when changing the crystal CO (CIRCUIT LOAD CAPACITANCE) value to a large value?
In other words, does Side Effect occur?
2) Is it possible to change CO value to S / W? In other words, is there a changeable register value?

0 Likes
1 Solution
Anonymous
Not applicable

The load cap depends on the crystal as well as the board layout. Please refer to section 5.1.1 of the attached document to understand the selection of correct load capacitor value AN70707 http://www.cypress.com/file/139936/download

View solution in original post

0 Likes
1 Reply