AnsweredAssumed Answered

SD card leak voltage with i.MX6Q.

Question asked by Keita Nagashima on Feb 10, 2015
Latest reply on Mar 24, 2015 by Artur Petukhov

Dear Sir or Madam,



My customer wants to keep only VDD voltage for SD card during 256 ms, to prevent data destruction at the power off.

(i.e. NVCC_SD is Low. VDD voltage was kept for 256 ms)

But, because DATA3 of SD card has internal pull-up, the leak voltage occurs via SD_DATA3 and NVCC_SD line.


There are possibility that the leak voltage occurs about SD_DATA3=700[mV] and NVCC_SD=150[mV] during power off to 256ms by customer's measured data on the their past i.MX6 product.

*Refer to attache file.



If the system drops on 0[V] by next time power on, is there possibility of the latch-up of i.MX6?


Best Regards,