[sdiy] MIDI specifications round 2

[Scott Bernardi]

I may be wrong, but I though current loops used 4mA as the "zero" point,
giving a range of 20mA-4mA = 16mA for full scale. 0mA would indicate a
break in the line.

BrightBoy wrote:

> > I'm not familiar with UART's, but I'm assuming they're IC's
> > that are used for Asynchronous transfer's, add start/stop bit, etc.
>
> Precisely....
>
> > Looking over my microcontroller a little more, I have notice
> > that it has a SCI built in.
>
> What specific microcontroller/model are you using????
>
> > All I would have to do is set the baud and write to the
> > register and it should take care of the start/stop bit
> > for me.
>
> Yep.  But you'll also have to configure the UART for the
> number of start/stop bits, as well as baud rate....
>
> > I'm not sure what the current loop is/does
>
> 20ma present = ON
> 0ma present = OFF
>
> Cheers,
>
> Jeff