详细介绍了ARM9的系统结构，存储器配置，DMA、ADC和触摸屏、中断控制器、I/O、PWM、UART等-Details on the ARM9 architecture, memory configuration, DMA, ADC and touch screen, interrupt controller, I/O, PWM, UART, etc.

改压缩包包括了ARM9中的 所有裸机部分程序，有GPIO,UART,FIFO,DMA,NOR FLASH,NAND FLASH,LCD等，这些程序都在FriendlyARM的Mini2440开发板上进行了验证-GPIO,UART,FIFO,DMA,NOR FLASH,NAND FLASH,LCD

s3c2440通用异步触发器提供3个独立的异步串行I/O，在CPU和UART之间传输数据时UART可以产生中断或DMA请求-s3c2440 universal asynchronous trigger provides three independent asynchronous serial I/O, UART can generate an interrupt or DMA request to transfer data between the CPU and the UART