In another embodiment, {TAIL ~ internal regulation signals} are shared with {HEAD ~ other devices} via TSVs 
In another embodiment , { TAIL ~ internal regulation signals } are shared with { HEAD ~ other devices } via TSVs
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH