hello,
this is my first used c6678, I want to use IO-before-core power sequencing,but currently,my designed power-up sequencing as followed: DVDD18 ,DVDD15 and VDDR1~4 first ramp up simultaneously(maybe after 0.1ms,they became stably); with that maybe after 4.9ms, CVDD,CVDD1,VDDT1~2 ramp up simultaneously and became stably.In my design,DVDD15 exceed CVDD and CVDD1 maybe 4.8ms,so I don‘t know whether my designed power-supply work normally.could you help me?
