一款廉价的多按键多数码管输出IC，通过SPI接口与单片机连接通讯，可大量节省单片机的输出输入接口，并节省系统处理时间，此包包括原理图与源代码，是低成本电器的较好选择,A low-cost multi-button multi-output digital control IC, through the SPI interface to connect with the single-chip communications, can save a lot of single-chip input output interface, and save the system processing time, this package includes schematic and source code, is a low- better choice of the cost of electrical appliances