184.108.40.206. HPS Method 7: Unused Peripherals in Reset
You should ensure that the reset manager holds each unused peripheral in reset. Refer to the rstmgr section in the SoC HPS Address and Register Descriptions website. Qsys and the Preloader control the initial reset state for each peripheral, you can reset individual peripherals under software control via the reset manager. Unlike the core (MPU) logic, the peripherals are designed to be most power efficient when held in reset.