P2041 USB High Speed EHCI Controller Disable / Forcing only Full-Speed Connect

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P2041 USB High Speed EHCI Controller Disable / Forcing only Full-Speed Connect

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fsever
Contributor I

Hi,

We are wondering that whether we can disable the USB High-Speed Control interface in P2041 in order to force the USB controller work in only Full-Speed or Low-Speed Mode. 

24th bit (PFSC) of USBx_PORTSC register is usefull for this purpose but, in this register, there is a note that " this bit is only for debugging purposes". 

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ufedor
NXP TechSupport
NXP TechSupport

The PFSC bit prevents the USB controller from declaring itself as a High-Speed and the Full-Speed link is established at a USB bus reset. So, the PFSC bit can be used for both testing and functional modes; there is no limitation to use it in debug mode only.

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ufedor
NXP TechSupport
NXP TechSupport

The PFSC bit prevents the USB controller from declaring itself as a High-Speed and the Full-Speed link is established at a USB bus reset. So, the PFSC bit can be used for both testing and functional modes; there is no limitation to use it in debug mode only.

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