Low voltage detection of smart water meter

Low-voltage detection is a very important issue for single-chip microcomputer systems. To a certain extent, it plays a role in ensuring the reliable operation of the system and avoiding data errors. The same is true in the design of smart water meters. Specifically, when the system is powered down to a threshold voltage (the threshold voltage should be higher than the minimum operating voltage of the CPU), the signal should be transmitted to the CPU through the corresponding voltage detection circuit, and the CPU will perform a software reset on the system in time. The voltage detector can be selected from the HT70 series of Hetai Company, which has a lower price and a complete specification.