> Hey Peter. Were you able to figure out the levels from the sheet? OK, I admit
> I couldn't, but that's why I'm not a hardware guy. :-)
> In any case, the waysmall uses the console-st board for its console access,
> and that board provides RS-232 level serial interfaces, which are in the
> -3v/-15v (1) to +3v/+15v (0) range.
> Peter Vandrish wrote:
>> On 4/18/08, Ned Forrester <nforrester@...> wrote:
>>> I uses a MAX3232C for a converter, so you can look up the data sheet for
OK. The relevant entry in the data sheet is "Transmitter Outputs"
"Output Voltage Swing", on page 3: +/- 5V minimum under load (it puts
out at least -5V for a mark, and at least +5V for a space, these are the
RS232 specified minumum values), and +/- 5.4V typical. There is no
maximum specified, because few people would care, so long as it remains
below the RS232 specified maximum of 25V without load. I would not
expect to see one that produces mush more than 6.5V unloaded. There are
some graphs later the show the change in output voltage under various
Ned Forrester nforrester@...
Oceanographic Systems Lab 508-289-2226
Applied Ocean Physics and Engineering Dept.
Woods Hole Oceanographic Institution Woods Hole, MA 02543, USA