Patent ID: 8531194

Claim:
A selectable threshold reset circuit coupled to a first power supply terminal and a second power supply terminal, comprising: a voltage-divider circuit, coupled to the first power supply terminal and to the second power supply terminal, for producing a V SENSE voltage that is a fraction of a voltage at the first power supply terminal; a comparator having a first input terminal coupled to the voltage-divider circuit, a second input terminal coupled to a reference voltage, and an output terminal for outputting a RESET signal when the first power supply terminal is at a voltage equal to or less than a reset threshold of the selectable threshold reset circuit; and a switch for controlling the voltage-divider circuit, the switch having a first switch terminal coupled to the voltage-divider circuit, a second switch terminal coupled to the second power supply terminal, and an input terminal for activating the switch, such that, when the switch is in a first state and the first power supply terminal is at a normal voltage level, the RESET signal is outputted at a normal reset threshold, and, when the switch is in a second state and the first power supply terminal is at a test mode voltage level that is less than the normal voltage level, the RESET signal is outputted at a test mode reset threshold that is less than the normal reset threshold.