Core Interface Description RPi connector: Easy access RPi UART interface: Easy access to all kinds of use UART interface modules such as RS232 RS485 USB TO UART modules. 8I / Os interface: Easy access to all kinds of uses I / O control module such as eight key module Logic Level Converter and Mix Board and so on. SPI Interface: Easy access to all kinds of use SPI interface modules such as AT45DBXX DataFlash Board L3G4200D Board and so on. I2C Interface: Easy access to all kinds of use I2C interface modules such as PCF8574 IO Expansion Board PCF8563 RTC Board LSM303DLHC Board and so on. Character LCD Interface: Convenient access LCD1602. Other interfaces Introduction USB TO UART interface After board CP2102 USB TO UART chip conversion into UART. Device Profile Power LED User LED: Facilitate I / O output test or display program running. User Button: Facilitate I / O input test or control program running. Potentiometer: Contrast adjustment for LCD1602 RTC real time clock battery powered PCF8563: RTC real time clock chip 32.768K crystal: RTC real time clock oscillator CP2102: USB TO UART to facilitate debugging . Device Profile CP2102 jumpers RTC Jumper User LED jumper User key jumpers Jumper above instructions: Short jumper: access to the sample program specified I / O; Disconnect Jumper: You can use cable access custom I / O. CD: http://m5.img.dxcdn.com/CDDriver/CD/sku.341553.rar