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<DIV>Jeff, The Acroname BrainStem module uses a MAX232 (or
look-a-like) chip powered by 5 volts from host.</DIV>
<DIV>The module, brings out 4 pins +5, GND, RX (TTL) and TX (TTL)
that plugs into a male 4 pin header.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>By the way (I never thought about this in the past), RTS and CTS use a
buffer and a driver and are brought out as pads on the module (on the TTL side).
Maybe best to jumper there to prevent driver contention.</DIV>
<DIV> </DIV>
<DIV>I did this (jumpered on RS-232 side) without thinking. Wonder about excess
current consumption....</DIV>
<DIV> </DIV>
<DIV>By the way I have used one of these on every microcontroller board I have
built / bought over the past several years. They are a big time saver if you are
wiring up microcontroller board from scratch (about $10 or $11 each)</DIV>
<DIV> </DIV>
<DIV>Ron</DIV></FONT></BODY></HTML>