32.768kHz oscillator is not oscillating,

[bigdogguru]

I just emailed the serial no and date code off to the individual with the list, asking him to check it for us.


I let you know, when I get a response back.

 

[hussain1.bangalore]

I just emailed the serial no and date code off to the individual with the list, asking him to check it for us.


I let you know, when I get a response back.

sure dude i ll be waiting for u r further reply

thank u

Make sure that this is the last time you use sms or short hand words while typing in the forum.... these kind of sms or short hand typing is not allowed .. all your posts will be deleted if continued further....

 

[hussain1.bangalore]

Hi did you get the serial code of the ICs which are not working ,,,can you please assist me as soon as possibl

sure dude i ll be waiting for u r further reply

thank u

 

[sunil_n]

hi,
did you try replacing with the new oscillator. I faced problem once with a batch of oscillators not working

 

[ckshivaram]

you can replace the crystal of the prototype board and put it on the non working board or put the crystal of non working board and test it in the prototype board which is working...

 

[hussain1.bangalore]

hi,
did you try replacing with the new oscillator. I faced problem once with a batch of oscillators not working

Hi sunil I have checked it by other oscillator also,, it seems board problem but the connectivity is perfect in board,, I am not able to find out were exactly the bug is


Hussian

---------- Post added at 04:59 ---------- Previous post was at 04:58 ----------

you can replace the crystal of the prototype board and put it on the non working board or put the crystal of non working board and test it in the prototype board which is working...

I will go though even and rivet back to you

 

[bigdogguru]

Hi,

I still have not heard back from the individual with the list of known defective LPCs. However, I did compare the numbers you posted, two of mbeds I have with known RTC problems and they do not match. Unfortunately, this does not mean you do not have a problem part. I'll send another email to the person with the list and see if I get a response. I only know he through email correspondence and I do not know how often he checks his email. I will also try and get it touch with another individual who is familiar with the problem.

---------- Post added at 05:57 ---------- Previous post was at 05:40 ----------

I just noticed the defective LPCs on my mbeds are both first revision:

The LPC176x devices typically have the following top-side marking:
LPC176xxxx
xxxxxxx
xxYYWWR[x]
The last/second to last letter in the third line (field ‘R’) will identify the device revision. This
Errata Sheet covers the following revisions of the LPC176x:

Revision identifier (R) Revision description:
‘-’ Initial device revision
‘A’ Second device revision

Field ‘YY’ states the year the device was manufactured. Field ‘WW’ states the week the
device was manufactured during that year.

The LPC Errata states:

Functional problems
Short description Revision identifier Detailed description
RTC.1 The Real Time Clock (RTC) does not work reliably
within the temperature specification.
revision effected ‘-’ initial revision only

So your LPCs most likely all have the defect. One of my defective LPCs was manufactured 1041- which is only three weeks before yours.

Sorry for the bad news.