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