# Power grid Source: [https://docs.qualcomm.com/doc/80-88500-4/topic/41_Power_grid.html](https://docs.qualcomm.com/doc/80-88500-4/topic/41_Power_grid.html) The power grid supplies power to various power domains, which can be switched on and off on the supported reference device. The table lists the power domains and the associated switches on the QRB5165 reference device.| Domain | QRB5165 | | --- | --- | | VDDCX | S1A + S2A + S3A | | VDDMM | S4C + S5C | | VDDMX | S3C | | VDD\_EBI | S6C | | VDD\_APC0 | S10A | | VDD\_APC1 | S7A + S8A + S9A | **Parent Topic:** [Power](https://docs.qualcomm.com/doc/80-88500-4/topic/38_Power.html) Last Published: Aug 18, 2023 [Previous Topic Double data rate subsystem and voltage supply](https://docs.qualcomm.com/bundle/publicresource/80-88500-4/topics/40_DDRSS.md) [Next Topic PMIC](https://docs.qualcomm.com/bundle/publicresource/80-88500-4/topics/42_PMIC.md)