M25PXX系列串行闪存是ST公司推出的系列存储器产品，具有体积小、规格全、容量大、功耗低和硬件接口简单的特点，非常容易与各种单片机构成存储系统。本文重点介绍此类存储器与单片机的接口，并结合AVR单片机，给出实际的电路图和软件驱动函数。-M25PXX series serial flash memory is the ST has introduced a series of memory products, has a small size, specification, capacity, low power consumption and hardware interface features simple, very easy to constitute a storage system with a variety of SCM. This article focuses on such memory and microcontroller interface, combined with AVR microcontroller, given the actual circuit and software driver functions.