USB Development Kit

[garylavers]

Hello,

I have the USB Development Kit and PCWH 3.212. Demo board works great, but not having much luck duplicating the circuit on a breadboard.
I have 6 ea. USBN9603 and a 28 pin SOIC-Clip for testing the USB chip.

Running the HID Example on an PIC16F877A.

I’ve duplicated the demo board circuit minus the signal generator and MAX232. Triple checked the connections, connected to USB on computer: RESULT: Windows detects the USB device but gives the “USB Device Not Recognized” message. I get a quick flash on the led connected to B3, then off.

The 24MHZ oscillator I’m using could be the problem but I doubt it. It’s a ESC CRYSTAL 24.000MHZ 20PF HC-49/US. Mine shows 24.0ESCH on top and demo board crystal shows 24.0ESCZ…not sure the difference.

I’m out of ideas.

Thanks a million.

Gary.

[rwyoung]

[garylavers]

Update to anyone trying this now or in the future...

Got it working. The oscillator I was using works fine. How do I know? I removed the crystal off the demo board and pub mine on. Demo board worked.

Problem was bad connection from the SOIC adapter on one of the pins. I was afraid to check each pin using my multimeter "buzzer" since it sends in ~3 volts. I don't know any other way to varify the lead connections (please let me know if there's a better way).

I've now switched to using a SOIC to thru-hole adapter from Digikey (part number A321-ND). It comes pre-soldered and works amazingly well.

[alexz]

I have used the similar from RS.
DIL Socket, RS: 197-2710
and W9500 Series SOIC to DIL Adapter 28 pins , RS: 158-2979
_________________
Alex