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Question, i.MX21 EXT_48M, EXT_266M

Question asked by AVNET JAPAN FAE (team share account) on Nov 19, 2014
Latest reply on Nov 24, 2014 by Artur Petukhov

Dear team,


I would like to ask about schematic design for i.MX21 board.

My customer is using i.MX21 for their product.

Recently, they found i.MX21 on the board could hang in a certain circumstance.

And they found the following pins are left open on the board though i.MX21 datasheet says those pins should be connected to GND.

- EXT_48M, EXT_266M

They need to know whether those pins left open are cause of this issue.

Could you show me what phenomenon can happen in the case that those pins are left open?

BTW, the parts# is MC9328MX21CJM.