Main Features  Operating voltage range: 2.0V ~ 5.5V  Operating temperature range: � ℃ ~~ 85 ℃     Built‐in 16bit Flip80251 MCU core     Built‐in LCD / LED driver circuit, Upper to 4 COM 、6COM、8COM  128Kbytes FLASH    ROM，4Kbytes xRAM     Built‐in low‐power consumption real‐time clock (RTC) with temperature compensation  Built‐in 4‐way independent hardware UARTs, supports the function of infrared modulation output and receive signal capture (the baud rate adaptive can be realized )  Built‐in 2‐way independent hardware 7816 protocol interface That can connect to the CPU Card & ESAM module directly。  Built‐in 1‐way I2C interface, that can connect to EEPROM directly.     Built‐in 1‐way SPI interface  Built‐in POR, BOR and LVD circuit  Built‐in 11‐bits ADC channels  Support various working mode (sleep/stop/normal mode)that can meet the different power requirements.