▁families ▁expand ▁upon ▁the ▁above ▁capabilities ▁to ▁include ▁higher ▁level ▁functionality ▁fixed ▁in ▁sil icon . ▁Having ▁these ▁common ▁functions ▁embedded ▁in ▁the ▁circuit ▁reduces ▁the ▁area ▁required ▁and ▁gives ▁those ▁functions ▁increased ▁speed ▁compared ▁to ▁building ▁them ▁from ▁logical ▁primit ives . ▁Ex amples ▁of ▁these ▁include ▁multip liers , ▁generic ▁D SP ▁blocks , ▁embedded ▁process ors , ▁high ▁speed ▁I / O ▁logic ▁and ▁embedded ▁mem ories . ▁ ▁High er - end ▁F PG As ▁can ▁contain ▁high ▁speed ▁multi - g ig ab it ▁trans ce ivers ▁and ▁hard ▁IP ▁cores ▁such ▁as ▁processor ▁cores , ▁E ther net ▁medium ▁access ▁control ▁units , ▁P CI / P CI ▁Express ▁controllers , ▁and ▁external ▁memory ▁controllers . ▁These ▁cores ▁exist ▁alongside ▁the ▁program m able ▁fabric , ▁but ▁they ▁are ▁built ▁out ▁of ▁trans ist ors ▁instead ▁of ▁L UT s ▁so ▁they ▁have ▁AS IC - level ▁performance ▁and ▁power ▁consumption ▁without ▁cons uming ▁a ▁significant ▁amount ▁of ▁fabric ▁resources , ▁leaving ▁more ▁of ▁the ▁fabric ▁free ▁for ▁the ▁application - specific ▁logic . ▁The ▁multi - g ig ab it ▁trans ce ivers ▁also ▁contain ▁high ▁performance ▁analog ▁input ▁and ▁output ▁circuit ry ▁along ▁with ▁high - speed ▁serial izers ▁and ▁deser ial izers , ▁components ▁which ▁cannot ▁be ▁built ▁out ▁of ▁L UT s . ▁High er - level ▁physical ▁layer ▁( PH Y ) ▁functionality ▁such ▁as ▁line ▁coding ▁may ▁or ▁may ▁not ▁be ▁implemented ▁alongside ▁the ▁serial izers ▁and ▁deser ial izers ▁in