Serial port question

[Ted Mittelstaedt]

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org
> [mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Mario Lobo
> Sent: Wednesday, January 30, 2008 5:22 PM
> To: Warren Block
> Cc: questions at freebsd.org
> Subject: Re: Serial port question
>
>
> On Wednesday 30 January 2008 21:42:28 you wrote:
> > On Wed, 30 Jan 2008, Mario Lobo wrote:
> > > I am doing some experiments with the WL5460AP. I doesn't have a serial
> > > connector but the RTL8186 does have a UART and the circuit
> board has a 4
> > > pin connector (4-3.3V, 3-TXD, 2-RXD, 1-GND) to the UART.

When you plugged in to this port, did you insert 1488 and 1489
line driver/line receiver chips?  RS232 serial data is +12V ~ -12V
and that UART output is undoubtedly TTL 5v+ signal level.  Hopefully
you didn't fry the port.

Ted