ZLG7290是串口的可以带64个按键,8位数码管显示的芯片,由于它的震荡电路是晶振,所以比7279稳定(7279是RC震荡)-Wire serial port can bring the 64 keys, eight digital display control chip, because it is crystal oscillator circuit shocks, the stable compared to 7279 (7279 was RC concussion)