Patent ID: 9740219
Date: 2017-08-22
CPC Classifications: G05F,H03K

Claim:
1. A semiconductor device comprising: an input terminal to which a power source, for which a time until a voltage equal or greater than a predetermined voltage value is output fluctuates according to an external environment, is connected; a power source section to which the input terminal supplies power from the power source; a power source supply terminal that supplies power to a driven semiconductor device; a switch that controls a connection between the power source section and the power source supply terminal; a voltage regulator to which the input terminal supplies power from the power source, and that supplies a voltage to the power source supply terminal; and an output terminal that is connected to the driven semiconductor device, and that outputs a standby signal instructing the driven semiconductor device to prepare for driving; and a controller that generates the standby signal, and that controls a timing at which the generated standby signal is output from the output terminal, wherein the controller includes a reset circuit that outputs the standby signal, and a control circuit that transitions internal operation to a control preparation state, due to the standby signal from the reset circuit.