2015/11/10
DSP控制器原理及应用
扩展存储器的最小系统需要的控制总线CB XR/W(读高/写低状态信号,输出/高阻) Read Not Write Strobe. Normally held high. When low, XR/W indicates write cycle is active; when high, XR/W indicates read cycle is active. 23
DSP控制器原理及应用
扩展存储器的最小系统需要的控制总线CB
XREADY引脚(外设准备好,输入) Ready Signal. Indicates peripheral is ready to complete the access when asserted to 1. XREADY can be configured to be a synchronous or an asynchronous input. See the timing diagrams for more details.
24