Lpc2000

On Mon, Jul 11, 2005 at 09:26:09PM -0000, slawcus wrote:
>  
> > 1) The LPC2148 supports USB 2.0 in full speed. Is this backward 
> > compatible to the 12 MBit/s when i have only an USB 1.1 host (e.g. 
> > my laptop) ?  
> 
> USB 2.0 low and full speed devices should work with 1.1 hosts and hubs. 

USB 2.0 full speed is identical to USB 1.1 except for the version
number in the device descriptor, which you can choose to set to 1.1
anyway if you prefer.

> > needed ? I think bits are going over D+ and D- with 480 MBit/s, even 
> > when only 12 MBit/s are used for LPC2148. Is this correct ?

No, the translation from 480Mb/s is done in the hub - your device will
never see anything faster than 12 Mb/s.


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