Sony CXD5602 User Manual page 124

layer and lower layer, the Power Control Sequencer first turns ON the power supply of the upper layer
(PWD_APP) and then turns ON the power supply of the lower layer (PWD_APP_DSP). The CPU can
recognize the completion of power supply control by the interrupt.
AHB IF
PWD_CTL
Power supply
*_RAMMODE_SEL
setting
ANA_PW_CTL
Power control
PMU_PW_CTL
request
PSW_CHECK
PWD_CTL_STAT
*_RAMMODE_SEL_STAT
ANA_PW_CTL_STAT
PMU_INT_MASK.NOGO_CTRL
PMU_INT_MASK.DONE
Figure PMU (Power Management Unit)-30 Overall Block Diagram of the PMU
3.4.1.4 Clock and Reset
Clock
Figure PMU (Power Management Unit)-31 shows a system diagram of the PMU's clock.

AHB IF
Operates using the ck_ahb_gear clock which is synchronized with the System and I/O Processor.

Check Register Value, Power Control Sequencer
Operates using the RCOSC or RTC_CLK_IN. When power is supplied, the RCOSC turns ON and the
initial value of the control register
. Before turning OFF the power switch of the RCOSC, make sure to switch the operation clock
the PMU
of the PMU to the RTC_CLK_IN.
Turn ON from upper power supply
(PWD_SYSIOP first)
Check Power Control Sequencer
Register Value
Check
Yes
PowerControl
Correct?
Start
No
Check result details
(RORTC_STAT_CLK_SEL2) selects RCOSC as the operation clock of
－124/1010－
ON OFF
OFF→ ON→
PWD_SYSIOP
OFF ON OFF
Power switch
PWD_APP
OFF ON OFF
Power switch
PWD_APP_DSP
OFF ON OFF
Power switch
PowerControl
Done
Turn OFF from lower power supply
(PWD_APP_DSP first)
CXD5602 User Manual
supply power to
PWD_CORE
PWD_CORE
PWD_SYSIOP
PWD_APP
PWD_APP_DSP
INT
to NVIC