circuit for a Async to Sync converter, using a AVR micro

[Iandd]

async and sync

Hi There,

Can anyone help me with a circuit for a Async to Sync converter, using a AVR micro.

As far as I understand Async data has no clock and Sync data does. Can I buffer the data received from the Async side and just clock it out the Sync side? or is it a lot more complicated than that??

Thanks

 

[goshka]

Re: Async to Sync

Metastability?

https://en.wikipedia.org/wiki/Metastability
https://www.xilinx.com/support/documentation/application_notes/xapp094.pdf
https://www.google.ru/search?hl=ru&...bility+xilinx+appnote&btnG=Поиск&lr=&aq=f&oq=
......

 

[bibo1978]

Async to Sync

Well it depends on the data rates, Like UART, a start and stop bit is enough, you can sample the data at double the speed or more, using a technique to aviod metastability a lot of techniques out there and a technique to detect 0-1 transition.
At very high speed Async data you will defenitly need a PLL and the clock data will be provided in the package.