Important Notes for DeepSleep For MitySOM-AM62¶

This page includes some notes regarding DeepSleep mode for the MitySOM-AM62x.

PMIC Adjustment¶

For DeepSleep mode on the MitySOM-AM62x, one of the PMIC registers on the SOM must be updated in order to allow the Buck regulators to enter Pseudo Frequency Modulation (PFM) mode. This is necessary to get the lowest power consumption while sleeping. The command to adjust the PMIC is shown below.

i2cset -f -y 0 0x30 0x20 0xdd

Critical Link is working on incorporating this setting into the reference SDK designs, but as of SDK 11 it is not included / set by default.

USB HUB wakeup source on DevKit¶

In addition, for the current release of the DevKit, the USB port that is connected to the HUB (USB1) must be disabled in order to enter and remain in sleep mode. Currently there are pullup/pulldown resistors on the DevKit on the USB hub interface that must be removed / altered in order to clear this issue. A note and errate for this issue will be published when final details are available. Please contact critical link for more details.