Re: [PATCH] Documentation about RS485 serial communications

[Grant Edwards]

On 2010-10-19, Claudio Scordino <claudio@xxxxxxxxxxxxxxx> wrote:

> +2. HARDWARE-RELATED CONSIDERATIONS
> +
> +   Some CPUs (e.g., Atmel AT91) contain a transceiver capable of working both
> +   as RS232 and RS485.

Pardon my curiosity, but I've looked at a few AT91 parts, and I've
never seen on with an internal transceiver -- nor does Google seem
able to find any.

Frankly, I'd be pretty surprised, since it would be very difficult
(fab-wise), to build a mircoprocessor with I/O cells capable of
withstanding the voltage levels specified in RS232.

Can you specify to which parts you're referring?

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