对带LED显示的非接触IC卡读写器的控制，寻卡、读取卡片的物理序列号、核对密钥、读卡、写卡，通过LED数码管显示卡号等信息。

For the master IC with 40 pins, it s 89C51 There are also com-port and 7805 as you can see the footprint Stuff of 4-pins button is for the hex keypad Resister pull-up and led can easily be recognized by their footprint I lost my schematic for

MTK 6250 平台LCD驱动 IC为ILI9486-MTK 6250 platform LCD driver IC ILI9486