In reply to dave_59:
Hi Dave,
sorry for confusion. My doubt is as mentioned in below pdf, on page 4th if no stimulus co-ordination is required we don’t need virtual interface it is mentioned. does it mean if usb and sata sequences can be started by normal sequence or virtual sequence? because there is no stimulus co-ordination is required between them. if these sequences are started by normal sequence not virtual sequence ,how to start these sequences?
http://www.sunburst-design.com/papers/CummingsDVCon2016_Vsequencers.pdf