From: Victor Rehorst (victor_at_newtontalk.net)
Date: Wed Jan 29 2003 - 07:52:29 PST
Quoting Damien Batstone <djb_at_er.dtu.dk>:
> >Well, I mean, if you could smoosh the hardware of a USB to Serial adaptor
> >small enough to fit on a board the size of the SER-001's, then yeah, I
> >guess so. Problem is I don't think you could get a one-chip solution for
> >this in small quantities.
> >
> >Here's a link to a datasheet for such a chip though:
> >http://home.xecom.com/insider/IC_Plus/TP561-DS-R001-000817.pdf
> >This is about 1cm x 0.7cm.
>
> Neither of these are ideal though, I think. The first simulates a
> serial port on the PC/Mac side, and the second does that, as well as special
> DLL's so hardware can see it as a USB port rather than serial port. In
> either case, it would be just as easy to embed it in a USB->RS422 cable, or
> buy a stand-alone USB->RS232/422 converter, and connect to the RS422 port on
> the newton.
What do you mean, "on the PC/Mac side?" Who cares what side it's on? The
RS-232 side would connect to Serial Channel 0 via the internal header in the
Newton, and the USB side (note the first line of the PDF is "Full Compliance
with the USB 1.1 specification) would be soldered to a B-type male USB port.
That way you wouldn't have to worry about whether or not you put your
USB->Serial thingy in your bag: all you would need is a normal USB A<->B
cable, which are pretty much everywhere by now, and certainly smaller than the
non-cable-embedded adapters (like the Belkin, which I own).
Certainly it would be easier to just buy a cable, but then you would still
have to plug it in via the interconnect dongle, or SER-001. And the SER-001
provides a miniDIN-8 port, and all the USB->Serial cable-type adaptors I've
ever seen only have DB-9 PC-style connectors, so you'd have to use a Newton
serial cable as well. With the USB adaptor embedded, it would already be
wired as if it was a Newton serial cable.
-- Victor Rehorst - victor_at_newtontalk.net - chuma_at_chuma.org NewtonTalk list administrator - http://www.newtontalk.net Will the last person to leave the platform please turn off the backlight? -- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries List FAQ/Etiquette/Terms: http://www.newtontalk.net/faq.html Official Newton FAQ: http://www.chuma.org/newton/faq/
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