sim900 SCH PCB 用SIM900做的GPS防盗器的原理图；PCB资料，格式：DXP 6.0-SIM900 SCH PCB

熟悉CORTEX-M3 内核芯片STM32F103，能正确配置和应用芯片的GPIO 模块、时钟模块、UART模块、PS/2 模块等；掌握IAR540 软件的调试方法。-Familiar CORTEX-M3 core chip STM32F103, correctly configured and application chip GPIO module, clock module, UART modules, PS/2 module and the like grasp IAR540 so