Power Sequencing

Kria K26 SOM Data Sheet (DS987)

Document ID
DS987
Release Date
2022-03-15
Revision
1.2 English

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 (VCC_SOM).

  1. When the VCC_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 VCCO rails for the HPIO and HDIO banks.