One-chip semiconductor device incorporating a power-supply-potential detecting circuit with reset function

摘要

A one-chip semiconductor device, such as a one-chip microcomputer, comprises a power-supply-potential detecting circuit (9) which, when the power supply potential (Vcc) becomes lowerthan a predetermined value (VD), generates a reset signal (RST) to reset, i.e., initialize the one-chip device. A reset signal inhibiting circuit (10, 11) is provided so as to inhibit the transmission of the reset signal during the check mode.