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Hungup during U-Boot

Question asked by Oleh Kernytskyy on Sep 7, 2017
Latest reply on Sep 13, 2017 by alexander.yakovlev

I am investigating field failure and product with MPC8314E processor hung up at the beginning of U-Boot process.

Debugging over the serial port indicates DRAM: 512 MiB (DDR2, 32-bit, ECC off, 266.667 MHz).

Process stopped after this line.

An actual DRAM has 4GB size - 2 ICs p/n MT47H128M16RT-25E  from Micron Technologies.

Can it cause the problem, and why DRAM size displayed incorrectly (512 MB instead of 4 GB)?

Copy of debugging screen shot it attached.

 

NOR FLASH memory with U-Boot image (p/n S29GL256N) has correct supply voltage, and signals CE and OE are seems OK.

 

What other troubleshooting steps/tools can I use to debug this failure?

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