In step with SoCs getting more functional and highly integrated recently, power consumption also tends to increase. At the same time, due to the restrictions on power consumption, as represented by ErP Lot26, and increasing awareness on energy-saving such as the reduction of CO2 emissions, power-saving is also an important element required for SoCs. Against this background, we have developed a power saving subsystem that satisfies two conflicting elements performance improvement and reduction of power consumption.

Network standby response is a function in which the subsystem carries out packet processing on behalf of the main system when it is in a standby state. This function also supports the following functions.
[Processing in system standby]
- Network standby response such as Ethernet (to be described later)
- Wake-up control based on notification from USB and other interfaces
- Centralized management of power gating and clock gating

Network standby response is a function in which the subsystem carries out packet processing on behalf of the main system when it is in a standby state. This function also supports the following functions. 

[Support Function]
- Main system wake-up assistance when a packet requiring processing by the main system is received
- The acceleration function that accelerates packet processing in a normal state