标签: 定状

如何在HDL中设定状态机上电初始状态○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○IwanttocreateagroupofFFswhichpower-upinacertainstate.HowcanIdothisinHDLwithoutcreatinganextraportinmydesignusingAlliance1.4?TheROCBUFwascreatedforsynthesisuserswhoneededtocreateFFswhichwouldpower-upina‘1’or‘0’state,buttheFFwouldnothaveanasynchronousresetorsetpin.FFsinXC4000typedeviceswithanasynchronousresetpinwillpowerupasa‘0’.FF’sinXC4000typedeviceswithanasynchronoussetpinwillpower-upasa‘1.’BydescribingFFswithanasynchronoussetorresetpin,youcancreateagroupofFFsthatpower-upinaknownpattern,l……