The MPC8360E boot failure

[liusonghw]

The MPC8360E boot failure
We use the MPC8360E chip in mass production, there has been a new problem, we urgently need your technical assistance.

Problem description:
MPC8360 can't booted,But it kept reading NorFlash(boot from NorFlash),I observed NorFlash's chip-select signal by oscilloscope,and compared the signal with other normal equipment.
Failure board: CS signal pulse width is very narrow.
Normal board: CS signal pulse width wider.
Test environment: The same boot files, the same material and configuration.
Test number: We produce 50pcs board,appear 2 of problems(the same situation) board and 48pcs normal board.

[alexander_yakov]

Please verify if LGTA pin has pull-up, this pull-up is present, properly mounted and has desired value.

[liusonghw]

As you guess, we really floating the pin.But is there any remedy? We can't connect the wire to the BGA below.

I have sent an e-mail to you in November 7th.Can you help us to check the schematic?

[alexander_yakov]

There is no way to make local bus working with LGTA pin left floating, sorry.

I'm not sure what you mean by email, if you mean technical support case, than please let me know case number.