Sony CXD5602 User Manual page 120

the SRAM once again, the data within the SRAM can be accessed. Retention mode enables reduction of
the leakage power and recovery of high speed of peripheral circuitry for SRAMs that are temporarily
not used.

ShutDown mode

A mode that turns OFF both the power supplies of the SRAM memory array and peripheral circuitry.
This mode consumes less power than the Retention mode, but the data in the SRAM is not retained.
3.4.1.2 Power Supply States
The following describes the main power supply states.
Power supply states
1 Power Off
2 Deep Sleep
3 Reset
4 Normal
The state begins from "Power OFF," and after the CXD5247 starts, power is supplied to the LSI and a reset is
enabled, changing the state to "Reset." After releasing the reset of the LSI, the System Control of the System and
IOP Domain is automatically started, and the state enters "Normal." In the "Normal" state, the power supply
control of each feature's Domain can be controlled. By issuing the Deep Sleep command to the CXD5247, the
state changes to "Deep Sleep." When events of the CXD5247 occur, such as the timer or interrupts, the state
changes to "Reset" and then to "Normal."
Table PMU (Power Management Unit)-34 Power Supply States
Description
Both the CXD5602 (referred to as "the LSI" hereinafter) and the CXD5247 are OFF.
The LSI is OFF and the CXD5247 is ON.
In this state, the RTC of the CXD5247 is counting, and time information can be obtained
from the CXD5247 after the LSI is started.
In this state, the LSI and CXD5247 are both ON, and the LSI is being reset.
The LSI and CXD5247 are both ON, and the System Control (PWD_SYSIOP) turns ON,
enabling power supply control of each Domain.
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CXD5602 User Manual