For the first circuit board of a batch of {TAIL ~ 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 the programmable electronic component 
For the first circuit board of a batch of { TAIL ~ 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 the programmable electronic component
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