Power Management; Overview; Power Domain - Sony CXD5602 User Manual

2.8

Power Management

2.8.1

Overview

The CXD5602 has a large power domain, which is divided into 11 domains. It performs ON control of necessary
functions only, while performing OFF control of the unnecessary ones, thereby reducing the power consumption.
Additionally, the SRAM or analog circuits such as the ADC within the power supply domains enable individual
power supply control.
Power supply control is implemented by setting on the Power Management Unit (referred as "PMU" hereinafter).
You can check with the PMU about the present power state.
2.8.2

Power Domain

The 11 power domains comprise a layer structure as shown in Figure Power Management-4. The lower-layer
power domains cannot be turned ON when the upper-layer power domains are OFF. Furthermore, PWD_GNSS
can be turned ON only when both PWD_GNSS_ITP and PWD_SYSIOP are ON.
VDD_CORE
PMU
PWD_SCU
Power switch
PWD_CORE
Power switch
PWD_SYSIOP_SUB
Power switch
PWD_SYSIOP
Power switch
PWD_APP
Power switch
PWD_APP_DSP
Power switch
PWD_APP_SUB
Power switch
PWD_APP_AUD
Power switch
PWD_GNSS_ITP
Power switch
PWD_GNSS
Power switch
Figure Power Management-4 Power Domain Layers
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CXD5602 User Manual
PWD_PMU
PWD_SCU
PWD_CORE
PWD_SYSIOP_SUB
PWD_SYSIOP
PWD_APP
PWD_APP_DSP
PWD_APP_SUB
PWD_APP_AUD
PWD_GNSS_ITP
PWD_GNSS
Always ON
Sensor
Domain
System and IOP
Domain
Application
Domain
GNSS
Domain