AVR-Chat

At 02:25 PM 21/01/04 -0800, you wrote:
>Today I adjusted the board voltage down to 3.3V and the PC quit receiving.
The AVR is still running just fine
>but the comm Tx level drops enough that the PC no longer receives. A scope
shows the Tx levels are -6.0 and +7.2
>when running at 5.0V, and -5.8 and +6.0 when set to 3.3V. Not a big change
- and still over the +/-5v that I
>thought was the "RS-232" spec - but enough to kill comm!

Is the RS232 (Max 232??) interface chip designed for 3.3V or 5V operation?
It may have stopped working!!

Regards

John Samperi

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