For the first circuit board of a batch of multiple circuit boards, the reference programmable electronic component receives and stores data from an external source, prior to {HEAD ~ the data} being loaded from the reference programmable electronic component into {TAIL ~ the programmable electronic component} 
loaded into
For the first circuit board of a batch of multiple circuit boards , the reference programmable electronic component receives and stores data from an external source , prior to { HEAD ~ the data } being loaded from the reference programmable electronic component into { TAIL ~ the programmable electronic component }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL