1)modeless command,无方式命令2)command mode,命令方式3)dual-order,双命令方式4)demand transfer mode,命令传输方式5)command mode selector,命令方式选择器6)command interrupt mode,命令中断方式
用法例句
As an example, the operate timing among 8237 working in the demand transfer mode,peripheral and CPU is also analyzed in detail,the logic design of implementing dual transfer mode is presented,and the process ability of DMA controller is widened.