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BF533 doesn't work

Question asked by uriy on Dec 14, 2011
Latest reply on Dec 14, 2011 by CraigG

We manufacture about 5000 boards with BF533SBBC(Z)400 per year on last 3 years.

We have troubles with last ordered DSP's.

We buy it in Russia.

We solder about hundred boards and it doesn't work.

DSP boot from SPI flash. I saw it by oscillocsope.

But then nothing happens.

We replace DSP on these boards with DSP from old orders. And board works fine.

It appears something wrong with DSP.

Can anybody validate DSP marking?

Marking on DSP (white paint):

ADSP-BF533SBBCZ400

1187277.1 0.5

#1008 SINGAPORE

 

For reference marking of good DSP's:

 

ADSP-BF533SBBZ400

1241105.1 0.5

0734 SINGAPORE                (white paint)

 

ADSP-BF533SBBZ400

2158513.1 0.6

#1127 SINGAPORE                (laser)

 

ADSP-BF533SBBZ400

2236073.1 0.6

#1127 SINGAPORE                (laser)

 

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