读操作的数据必须结束或者截断，否则不能发送写指令。
Data from READ burst must be completed or truncated before a subsequent WRITE command can be issued.
数据处理单元可以完成如任务调度器所指令的任务，向调度器传送任务结束信号并且转换到备用状态。
The data processing units may complete the tasks as instructed by the task scheduler, transmit task end signals to the scheduler and transition into standby states.
在该加速期间结束时，以占空比与速度指令数据对应的PW M脉冲来控制开关机构，从而驱动该直流马达。
When the acceleration period has terminated, the switch means is controlled by a PWM pulse of the duty ratio in accordance with the speed instruction data, there by driving the DC motor.
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