Patent ID: 9739587
Date: 2017-08-22
CPC Classifications: G01B,G01D,G11C,H02J,Y02E

Claim:
1. A semiconductor integrated circuit comprising: a regulator configured to stabilize a power supply voltage from a solar cell and to output the same; a voltage detection circuit configured to detect the power supply voltage from the solar cell or an output voltage from the regulator; a power-on-reset circuit configured to output a reset signal to an external digital circuit by a voltage detection signal output from the voltage detection circuit; and a memory main body configured to write and read data by the power supply voltage from the solar cell or the output voltage from the regulator, wherein the voltage detection circuit outputs the voltage detection signal to the power-on-reset circuit when the output voltage is equal to or higher than a detection voltage, and the power-on-reset circuit outputs the reset signal to the external digital circuit when the power-on-reset circuit receives the voltage detection signal from the voltage detection circuit.