本书详细介绍了有关ARM９的体系架构，其中包括常用的串口、IIC总线、CAN总线、SPI总线、EEPROM 、时钟、D／A 及A／D 转换等内容-This book describes in detail about the ARM9 architecture, including the popular serial, IIC bus, CAN bus, SPI bus, EEPROM, clocks, D/A and A/D converter etc.