Errata ERR005852 : what is "analog bypass mode"?

[norishinozaki]

Hello Champs,

In the Errata ERR005852 "Analog: Transition from Deep Sleep Mode to LDO Bypass Mode may

cause the slow response of the VDDARM_CAP output".

The workaround is "The software workaround to prevent this issue it to switch to analog bypass mode (0x1E), prior to

entering DSM, and then, revert to the normal bypass mode, when exiting from DSM"

Does this mean that 11110(0x1E) is a special value which turns digital LDO into "analog bypass mode"?

Best regards,

Nori Shinozaki

[igorpadykov]

Hi Nori

LDO "analog bypass mode" IMX6DQRM

sect.50.7.4 Digital Regulator Core Register (PMU_REG_CORE)

is value:

11111 Power FET switched full on. No regulation.

so description in errata can be considered as misprint.

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[norishinozaki]

Hello Igor,

Thanks! So you mean, 0x1E is typo in the Errata, 0x1F is a correct value to turn on analog bypass mode?

Best regards,

Nori Shinozaki

[igorpadykov]

Hi Nori

yes 0x1F is a correct value

Best regards

igor

[norishinozaki · Accepted solution]

Igor,

Thank you!

Best regards,

Nori Shinozaki