>  want to connect a MAC with a 16C74 via a serial line. I intend to
> transmit
> only some ascii sequences through the line. But I'm not a Mac user
and so
> I
> have some questions.
> * Which software (terminal progam) can I use to transmit the ascii
> sequences?

Francis deck has a "Dumb" terminal stack in his PIC programmer
package, that is free, and will probably meet your need.

> * I want to use only two lines (TxD and GND) between the Mac and the
> PIC. Ok?

Yes, as long as flow control is not needed.  Make sure the Mac doesn't
outpace the PIC.  Easy to do, hard to debug!

> * Can I use the same schematic like in AN 547 (RS-232 interface)?
>

Yes, the Maxim chip or the other level driver schematics are fine.
For non-critical applications, the TTL can go straight into the Mac,
but the Mac will see any power bleed making the low level slightly
above zero as a high, so this can sometimes get tricky.


Regards,

Kevin Coble

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<x-rich><X-FONTSIZE><PARAM>12</PARAM><FONTFAMILY><PARAM>Geneva</PARAM>>  want
to connect a MAC with a 16C74 via a serial line. I intend to

> transmit

> only some ascii sequences through the line. But I'm not a Mac user
and so

> I

> have some questions.

> * Which software (terminal progam) can I use to transmit the ascii

> sequences?


Francis deck has a "Dumb" terminal stack in his PIC programmer
package, that is free, and will probably meet your need.


> * I want to use only two lines (TxD and GND) between the Mac and the

> PIC. Ok?


Yes, as long as flow control is not needed.  Make sure the Mac doesn't
outpace the PIC.  Easy to do, hard to debug!


</FONTFAMILY></X-FONTSIZE><SMALLER><X-FONTSIZE><PARAM>10</PARAM><FONTFAMILY><PARAM>Geneva</PARAM>> </FONTFAMILY></X-FONTSIZE></SMALLER><X-FONTSIZE><PARAM>12</PARAM><FONTFAMILY><PARAM>Geneva</PARAM>* Can I use the
same schematic like in AN 547 (RS-232 interface)?

</FONTFAMILY></X-FONTSIZE><SMALLER><X-FONTSIZE><PARAM>10</PARAM><FONTFAMILY><PARAM>Geneva</PARAM>>


Yes, the Maxim chip or the other level driver schematics are fine.
For non-critical applications, the TTL can go straight into the Mac,
but the Mac will see any power bleed making the low level slightly
above zero as a high, so this can sometimes get tricky.



Regards,


Kevin Coble


---------------------------------------------------

This message was created and sent using the Cyberdog Mail System

---------------------------------------------------

</FONTFAMILY></X-FONTSIZE></SMALLER>
</x-rich>