Power Sequencing

The carrier card power management circuit for your application must use the following sequence to power on the K26 SOM. Your carrier card supplies the +5V SOM power rail (V_{CC_SOM}).

1. When the V_{CC_SOM} voltage level is within the specified range, the carrier card deasserts the POWER_OFF_C2M_L signal.
2. The K26 SOM initiates onboard power sequencing.
3. The K26 SOM asserts the VCCOEN_PS_M2C signal, indicating to the carrier card to turn on the supply rails for the PS peripheral devices.
4. The K26 SOM asserts the VCCOEN_PL_M2C signal, indicating to the carrier card to turn on the supply rails for the PL peripheral devices as well as all V_CCO rails for the HPIO and HDIO banks.