AVR-Chat

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@proaxis.com>
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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