Brent Brown wrote: > Bob Barr wrote: > > >>On Wed, 19 Mar 2003 21:38:26 +0800, Peter Crowcroft wrote: >> >> >>>1. Tony Nixon has designed a USB port PIC programmer for all Flash >>>PICs. It has no external power supply. Mostly surface mount only the >>>3mm bi-LED pokes up out of the box next to the 40 pin wide-slot ZIF >>>socket (supplied.) It has a no-keypress mode for volume programming. >>>The buyer will only have to solder the bi-led and the ZIF socket. >>> >>>See photos at >>> >>>http://www.kitsrus.com/jpg/k128_1.jpg >>> >>>http://www.kitsrus.com/jpg/k128_2.jpg >>> >>>It is now in production and I hope to release it about april 3 before >>>I shoot off to the Amazon River for 12 days. >>> >> >>Maybe I'm missing something here but that USB connector sure looks >>like a host connector (type A) rather than a device connector (type B >>or mini-B). If that's really the case, where are you getting cables >>for it? >> >>Normally USB cables are A-to-B or A-to-mini-B. AFAIK, type A to type A >>cables aren't allowed under the USB spec. > > > It's most likely a type A male, the mating part ot the host connector > (PC end) is type A female. Type A male / type A female extension > leads are what it would use and they seem to be in common use and are > available in catalogs. I don't think it is a "A" male, it exactly looks like a standard "A" receptable, the one you find at your PC. > Don't know what the standard says about type A to type A You can find a list of the possible connectors for USB devices or USB hosts in the specification, and A to A is not an allowed combination (at least in the USB1.1 spec, and I do not think they changed it in USB2). The USB spec is very clear about this: "A" is for the host, "B" is for a device ("A" is downstream from the host or a hub, "B" is upstream from a device to the host.) The reason for this is that no one makes a circular USB connection or tries to connect two hosts with a simple USB cable. I suspect there are more devices violating the spec, because of all the adapters an cables you can buy. Right to the spec, there should only be "A" male to "B" male cables Not part of the USB spec I have, but which make sense to me: - extension cables with male to female, both "A" or both "B" - and these mini usb adapter cables to "A" male but there are much more cables you can get.... :-( Florian -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.