[GreenKeys] RS232 to TTY Loop Boards

[Ralph Mowery]

----- Original Message ----- 
From: "Eric" <epvgk at limpoc.com>
To: <greenkeys at mailman.qth.net>
Sent: Monday, February 16, 2015 5:50 PM
> Yes - that's the problem - on a lot of chips, the clock just can't
> be programmed to go that slow. For instance on the chip I tried last,
> you need to have the CPU clock at 16mhz for the USB bus to work right,
> but the serial UART divisors can't be set high enough to divide this
> down to 45 baud.

I am not familiar with the chips you are using, but couldn't a UART type 
chip be fed wth a differant than standard crystal to get to the lower clock 
frequency it needs ?
Maybe they are built into the computer and can't beclocked by a seperate 
crystal.