SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND WEARABLE DEVICE

摘要

To provide a semiconductor device which can operate stably while reducing power consumption.SOLUTION: A semiconductor device includes a CPU26, a system controller 24 for specifying the operation speed of the CPU26, an SRAM 30 having P type SOTB transistors SP1, SP2 and N type SOTB transistors SN1-SN4, and connected with the CPU26, and a substrate bias circuit 23 connected with the system controller 24, and capable of supplying substrate bias voltages Vsp, Vsn to the P type SOTB transistors SP1, SP2 and N type SOTB transistors SN1-SN4. When the system controller 24 specifies a low speed mode for operating the CPU26 at a low speed, the substrate bias circuit 23 supplies the substrate bias voltages Vsp, Vsn to the P type SOTB transistors SP1, SP2 and N type SOTB transistors SN1-SN4.SELECTED DRAWING: Figure 2