check the proper oscilator configuration and the wdt

  Bruno L. Albrecht
  Eng. da Computa=E7=E3o/06
  Falker Automa=E7=E3o Agr=EDcola Ltda.
  http://www.falker.com.br



Jesse Lackey escreveu:
> ....just a shout-out to see if I'm doing something dumb.
>
> I have a design with the PIC18F6410, and I can get it to program, but =

> not start running.  At all, ever.  Not with xtal, or internal RC.
>
> I haven't used the 6410 before, and it could be a problem with the CCS =

> compiler (my copy is 2 years old - the chip is supported, but that =

> doesn't mean it works).  CCS seems to be setting the config bits =

> properly.  I can check/set them in MPLAB.  No help.
>
> The footprint and specs (as far as voltages / xtal go, anyway) look to =

> be the same as the 6520, which I have used in a half dozen designs.
>
> I'm using MPLAB 8.3.  I have MCLR/ pulled up to +5V with a 10K.  The =

> xtal is a 10Mhz of the same type I've used in other designs.  At =

> power-on I can see the MCLR/ line rise as normal.  I have decoupling =

> caps on each pin that gets +5V.  The +5V line has a bulk 220uF cap, and =

> comes from a DC bench supply.
>
> I can program it all I want, never starts running, no current draw.
>
> I'm trying to use the 6410 to save $3 per chip for the production run, =

> but am about to drop $70 to digikey overnight more 6520s to save this =

> underfunded, poorly scheduled project.
>
> Any advice appreciated.  I'm kind of losing my mind right now.
>
> Thanks.
> J
>
>   =

-- =

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