mask out

The&nbsp;interrupt&nbsp;mask&nbsp;part&nbsp;of&nbsp;the&nbsp;CONFIG&nbsp;register&nbsp;is&nbsp;used&nbsp;to&nbsp;mask&nbsp;out&nbsp;the&nbsp;interrupt&nbsp;sources&nbsp;that&nbsp;are&nbsp;allowed&nbsp;to&nbsp;set&nbsp;the&nbsp;IRQ&nbsp;pin&nbsp;low.<br />请问mask&nbsp;out是什么意思，IRQ低电平的时候表明是产生了中断吗？