Semiconductor device

A semiconductor device comprising:

• a first power supply line configured to transmit a first power supply voltage;
• a second power supply line to which the first power supply voltage is supplied via a switch circuit controlled by a first control signal from a power supply manager;
• and
• a plurality of memory circuits each having a latch circuit and a flip-flop circuit and capable of saving data stored in the flip-flop circuit to the latch circuit by a second control signal from the power supply manager and retaining the saved data,
• wherein the flip-flop circuit is connected to the second power supply line and operates using the first power supply voltage on the second power supply line as a power supply voltage, and
• wherein the latch circuit is connected to a signal line configured to transmit the second control signal by a first unidirectional circuit, and the latch circuit operates using a second power supply voltage supplied via the first unidirectional circuit as a power supply voltage when it retains the data.