BL0921 集成电路是电子电度表的核心芯片， 基于此芯片设计的电子电度表具有外围电路简单、 精度高、稳定性好等特点，适用于单相两线电力用 户的电能计量-BL0921 integrated circuit chip is the core of electronic watt-hour meter, based on this chip design of electronic watt-hour meter with simple peripheral circuits, high