Specifies whether I/O accesses should attempt to use DMA (TRUE) or Programmed I/O (FALSE). In some implementations, this property may have global effects even though it is documented as a local property. This behavior affects performance and not functionality. Note: In the Instr class, this property is valid only for GPIB, GPIB-VXI, PXI, and VXI resources.

注释

下表列出了该属性的特性。

短名称 Allow DMA
数据类型 cbool.png
权限 读取/写入
可用于运行引擎 是
可用于实时操作系统 是