Re: 52235/52230 problem

Dear Mark

One information also required.

When we are using the two layer board for the ETHRNET what should be trace width and separation required from out put of the Magnatics to RJ45 connector as those two pairs are connected as differntial pair.


regards
Sanjay Morab
  ----- Original Message ----- 
  From: Mark Butcher 
  To: Sanjay Morab 
  Sent: Friday, January 25, 2008 2:59 PM
  Subject: AW: [ColdFire] 52235/52230 problem


X-SpamDetect-Info: ------------- Start ASpam results ---------------
X-SpamDetect-Info: This message may be spam. This message BODY has been altered to show you the spam information 
X-SpamDetect: ****: 4.300000 From3consonants=3, Some html comments=0, Aspam=0
X-SpamDetect-Info: ------------- End ASpam results -----------------

Hi Sanjay

   

  I don't see the standard pull-up resistors on the BDM interace lines TMS, TRST, TDI and TDO.

  I wonder whether these are floating and so the chip is sometimes booting to DBM mode or during operation switched to BDM mode.

   

  Regards

   

  Mark

   

  I have used 2 layers with NE64 (almost identical footprint and LAN interface) so I expect that it is possible also with the M52230. 4 layers will of course be better but I wouldn't expect extreme changes.

   

   

  Mark Butcher Bsc (Hons) MPhil MIEE

   

  M.J.Butcher Consulting                

  Obere Bahnhofstr. 13,  CH-5507 Mellingen,

  Switzerland         www.mjbc.ch / www.uTasker.com

  056 491 48 10 / 079 402 26 37 / Skype: M_J_Butcher

   

   

   

  -----Ursprüngliche Nachricht-----
  Von: [email protected] [mailto:[email protected]] Im Auftrag von Sanjay Morab
  Gesendet: Freitag, 25. Januar 2008 03:13
  An: [email protected]
  Betreff: [ColdFire] 52235/52230 problem

   

  Dear Mark

  Hi,

   

  We are using MCF52230 for our one of the project. We had developed all source code using the EVB. The code works fine. The EVB is for 52235. But when we transfer the coder to target board which has MCF 52230 there are few problems we are facing.

   

  1. The Does not boot up all the time even with the sample code. It does ot detect the BDM also.

  2. When it starts , for some time it works fine and then it starts giving the PC ERROR = 0x000294 or similar.

   

   

  I am attaching the pdf of the schematic if it has any problems.

   

  Please let me know currently the Board is Two layer, is it strongly recomended to have 4 layers.

   

  Sanjay Morab

   

  Accord Electronics
  50, Rashmi Industrial Estate,
  Vasai Industrial Area,
  Navghar, Vasai Road(e),
  Dist. Thane
  Pin - 401210
  Ph -+91-250-3240050
        +91-250-2391407
  Fax - +91-22-28400579
  H.P. - +91-9324895103

  [email protected] Send a post to the list. [email protected] Join the list. [email protected] Join the list in digest mode. [email protected] Leave the list. [email protected] Send a post to the list. [email protected] Join the list. [email protected] Join the list in digest mode. [email protected] Leave the list.