AW: 52235/52230 problem
"Mark Butcher" <[email protected]>
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers.coldfire |
|---|---|
| Message-ID | <000001c86199$20149710$7400a8c0@mjblp004> |
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=0.3, Some html comments=1.0, Aspam=3.0 X-SpamDetect-Info: ------------- End ASpam results ----------------- Sanjay I recommend using the Layout guide in the following Freescale Application Note: AN2759 [it is for the NE64 but suitable also for the Coldfire] http://www.freescale.com/files/microcontrollers/doc/app_note/AN2759.pdf? fpsp=1 <http://www.freescale.com/files/microcontrollers/doc/app_note/AN2759.pdf ?fpsp=1&WT_TYPE=Application%20Notes&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=p df&WT_ASSET=Documentation> &WT_TYPE=Application%20Notes&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_A SSET=Documentation The MC9S12NE64 has a heat sink area on the bottom of the chip which is used to help dissipate heat (from the PHY) to the board. This isnt available on the M5223X and so it does tend to run a little hot. Check the core supply voltage on VDD1 and VDD2 it should be decoupled with capacitors and measure about 2.5V. I did have a board (M52233) which suddenly stopped working and this voltage was too low it became very hot. After replacing the chip the board worked correctly again. Good luck Regards Mark Mark Butcher Bsc (Hons) MPhil MIEE M.J.Butcher Consulting Obere Bahnhofstr. 13, CH-5507 Mellingen, Switzerland <http://www.mjbc.ch/> www.mjbc.ch / <http://www.utasker.com/> www.uTasker.com 056 491 48 10 / 079 402 26 37 / Skype: M_J_Butcher <http://www.uTasker.com> -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Sanjay Morab Gesendet: Montag, 28. Januar 2008 03:04 An: [email protected] Betreff: Re: [ColdFire] 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 [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.