[time-nuts] SiLabs

[Glenn]

Is the USB bus really a good way to get 1 PPS into a machine? I would 
think it
would have quite a bit of jitter in it.
-glenn

Randy Warner wrote:

>Didier,
>
>I too have looked at the SiLabs parts. I may just have to get one of
>their eval boards.
>
>I use the SiLabs CP2102 USB-to-Serial converter in my new receiver Eval
>Boards. Tiny little thing, no external components, and it also has the
>ability to handle more than just RxD and TxD traffic. That was always a
>problem with the FTDI USB converter in that you could not put the 1PPS
>out on the USB bus. A lot of times I ended up using the USB just for
>power and used the serial port for comms. Seems like an awful waste of a
>USB connection. Anyway, with the 2102 I can put a the 1PPS on a
>"virtual" DCD line and keep TAC32 happy.
>
>Randy
>  
>