AVR-Chat

Thanks for your reply.

I have checked all of your suggestions, pins and other things are OK.
Tell me if minor variations of crystal frequency can cause the problem, I think there may be some variations?  my system is running on free RTOS, programmers have used multitasking techniques and CPU runs quite loaded.

Fraz
ExclaimFZC.com

--- In AVR-Chat@yahoogroups.com, wg0z@... wrote:
>
> 
> Jim's right about pin numbers being different, DIP vs TQFP.
> 
> double-check your schematic.
> 
> the tqfp's "extra" 4 pins are two extra vcc/gnd pin pairs which must be implemented.
> regrdless of package, make sure the AVCC/AREF/GND triple (pins 27-29 of tqfp) is implemented too, even if you're not really using port A.
> 
> -----Original Message-----
> From: Jim Wagner <wagnerj@...>
> To: AVR-Chat@yahoogroups.com
> Sent: Sat, Oct 17, 2009 9:39 pm
> Subject: Re: [AVR-Chat] Atmega32 SMT version not working
> 
> 
> 
> 
> 
> n Oct 17, 2009, at 7:25 AM, frazgk wrote:
> > Hi
> 
>  I have a system designed by a local company based on Atmega32, and  
>  its works fine. then I have it made from China on SMT.
>  Problem: SMT version is not generating PWM. I use the same programe  
>  code on SMT version.
> 
>  I sent the prototype back to china and they test it with their own  
>  code and they say that the chip is generating PWM.
> 
>  I also sent them my code, they say my code is not generating PWM.
> 
>  Can any one tell me what is wrong with SMT version, when my 40 pin  
>  dip version is working fine?
> 
>  Fraz
>  ExclaimFZC.com
> 
> 
>  
> ell, a first guess: DIP has 40 pins and SMT has 44. Maybe there is  
> ome difference you are over looking? For example, on SMT version,  
> B40 is on pin 40 while it is on pin 1 of DIP.
> Jim Wagner
> regon Research Electronics
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