There is to be provided a liquid crystal drive controller with a built-in power
supply circuit wherein latch-up is made difficult to arise even if one amplitude
level of the segment line drive voltage is set to the ground potential and the
levels of other liquid crystal drive voltages are determined accordingly. A semiconductor
integrated circuit with a built-in power supply circuit, wherein a negative voltage
generated in a power supply circuit is applied to a substrate or a well region
as a bias voltage, is provided with a switch for temporarily applying the ground
potential to the substrate or well region to be biased with the negative voltage
at the time of starting up the power supply circuit.
