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i.MX6DQ: When to provide power with external 32KHz clock cirtuit

Question asked by Nori Shinozaki on Nov 26, 2015
Latest reply on Nov 26, 2015 by Nori Shinozaki

Hello Champs,


From HDG, "Table 2-7. Oscillator and clock recommendations" wrote;


2. External kilohertz source

"The RTC_XTALI signal should not be driven if the VDD_SNVS_CAP supply is off"


Could you explain the purpose of this restriction?


My customer is thinking to use VDD_SNVS_IN from PF0100, dropping to 1.0V to provide power with the external 32KHz clock circuit.


Since VDD_SNVS_CAP is generated from VDD_SNVS_IN with some delay, might there be a condition which applies the above restriction?


Best regards,

Nori Shinozaki