Circuit and method of adjusting system clock in low voltage detection, and low voltage reset circuit

摘要

The present invention discloses a circuit and a method of adjusting system clock in low voltage detection, and a low voltage reset circuit. The circuit of adjusting system clock in low voltage detection comprises: a clock generator for supplying a clock to at least one circuit in a system; and a low voltage reset circuit for generating an adjustment signal according to a detected voltage level, so that the clock generator adjusts or stops the clock supplied to the at least one circuit in the system.

主权项

1. A circuit of adjusting system clock in low voltage detection, comprising:
a clock generator for supplying a clock to at least one circuit in a system; and a low voltage reset circuit for generating an adjustment signal that is input to the clock generator according to a detected voltage level of a supply voltage, so that the clock generator adjusts or stops the clock supplied to the at least one circuit in the system, when the detected voltage level is lower than a predetermined first threshold value, the low voltage reset circuit generates the adjustment signal, and wherein the low voltage reset circuit also generates a reset signal that is input to the at least one circuit when the detected voltage level is lower than a predetermined second threshold value, such that the at least one circuit in the system is reset to a predetermined value, wherein the predetermined first threshold value is greater than the predetermined second threshold value.