Power Management Signals

Kria K26 SOM Data Sheet (DS987)

Document ID
DS987
Release Date
2022-03-15
Revision
1.2 English
PWROFF_ C2M_L
  • PWROFF_C2M_L is an active-Low signal to power down the SOM and pulled High to the +5V SOM input power rail.
  • When PWROFF_C2M_L is asserted, the SOM power regulators perform a full-power shutdown of the device following the correct regulator power-down sequence. This signal does not alert application software to the power shutdown.
  • Upon deassertion of PWROFF_C2M_L, the SOM power regulators initiate a power-on sequence.
Note: Asserting PWROFF_C2M_L does not perform a software shutdown or notify the system of the shutdown. The power regulators will start to power down instantly. Use the MIO31_SHUTDOWN pin and PMU functionality to initiate a software shutdown.
PWRGD_LPD_M2C
PWRGD_LPD_M2C is an active-High push-pull output signal from the SOM power system that indicates the power status of all SOM PS low-power domain (LPD) rails. PWRGD_PL_M2C is pulled Low when inactive. When active, it sources the 5.0V rail on the SOM. A carrier card can use this signal to monitor LPD status.
PWRGD_FPD_M2C
PWRGD_FPD_M2C is an active-High push-pull output signal from the SOM power system that indicates the power status of all SOM PS full-power domain (FPD) rails. PWRGD_FPD_M2C is pulled Low when inactive. When active, it sources the 5.0V rail on the SOM. A carrier card can use this signal to monitor FPD status.
Note: The K26 SOM does not have split rails for LPD and FPD. PWRGD_LPD_M2C and PWRGD_FPD_M2C are tied together on the SOM.
PWRGD_PL_M2C
PWRGD_PL_M2C is an active-High push-pull output signal from the SOM power system that indicates the power status of all SOM PL power rails. PWRGD_PL_M2C is pulled Low when inactive. When active, it sources the 5.0V rail on the SOM. A carrier card can use this signal to monitor PL power status.
VCCOEN_PS_M2C
VCCOEN_PS_M2C is an active-High push-pull output signal from the SOM power system to enable the PS VCCO rails that are supplied by the carrier card. VCCOEV_PS_M2C is pulled Low when inactive. When active, it sources the 5.0V rail on the SOM. A carrier card can use this signal as an indication to turn power on for all PS peripherals.
VCCOEN_PL_M2C
VCCOEN_PL_M2C is an active-High push-pull output signal from the SOM power system to enable the PL VCCO rails that are supplied by the carrier card. VCCOEN_PL_M2C is pulled Low when inactive. When active, it sources the 5.0V rail on the SOM. A carrier card can use this signal as an indication to turn power on for all PL peripherals.