[Elecraft] Serial IO/KIO2 is "deaf"

Pieter Meiring pdm at meiring.org.uk
Sat May 28 14:26:49 EDT 2005


On Saturday 28 May 2005 17:12, you wrote:
> The KIO2 translates the level from RS232 to TTL which is applied directly
> to pin 26 of the MCU thru AUX/IO connector J4/P4. Not much can go wrong
> there, but if you have a scope you can look at pin 26 and see if it is
> toggling when you send data to the K2. If not the problem is upstream, if
> it is getting to pin 26 then you may have a bad MCU, try reseating it
> before you panic and buy another one.
>
> 73 Jim, W4ATK
>
>

Thanks, Jim.
This is most bizarre!
I have a scope and have checked that the rs232 signal goes right back to pin 
26 on the MCU.
I have also replaced the MCU (version 2.04P) with the previous version (2.03D) 
without result.
Pieter


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