eric.robishaw wrote:
> According to the 7800 docs, the 7800's COM3 header has 2 serial ports
> (ttts4, ttts5).
>
> I'm currently able to use ttts4, but want to take advantage of
> RTS/CTS, which the manual lists as being available for this port on
> the RTS/CTS lines (7/8).
>
> However, the docs also indicate ttts5 TX/RX on header 3 is using these
> same pins (7/8). So, which is it?
It's both.
> Are pins 7/8
> RTS/CTS for ttts4 OR
If ttts5 is closed, then pins 7/8 act as RTS/CTS for ttts4.
> RX/TX for ttts5
If ttts5 is open, then pins 7/8 act as RX/TX for ttts5.
More specifically, when the BAUD bits of the STAT register is set to any
non-zero baud rate, the UART functions overrides whatever is normally on
the pin. But the tsuart driver takes care of this automatically when
you open the port, and shuts it off when you close the port.
> I've tried looking at the schematics, but can't make heads or tails.
>
>
>
>
> Eric
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