也就是选择出唯一 一个APB从设备以进行读写动作。 (2)写操作时:负责将AHB送来的数据送上APB总线。 (3)读操作时:负责将APB的数据送上AHB系统总线。 (4)产生一时序选通信号PENABLE来作为数据传递时的启动信号。 2、读传输 下图表示了APB到AHB的读传输: 到AHB的读传输 传输开始于AHB总线上的T1时刻,在T2时刻...
PENABLE Master This strobe signal is used to time all accesses on the peripheral bus. The enable signal is used to indicate the second cycle of an APB transfer. The rising edge of PENABLE occurs in the middle of the APB transfer. PWRITE Master When HIGH this signal indicates an APB write...
Generates a timing strobe, PENABLE, for the transfer Can implement single read and write operations successfully. The diagram below shows the interface: Basic Implementation Tools HDL Used : Verilog Simulator Tool Used: ModelSIM Synthesis Tool Used: Quartus Prime ...