An intelligent write method allows {TAIL ~ each memory cell} to either store an analog signal or {HEAD ~ multiple digital signals} 
An intelligent write method allows { TAIL ~ each memory cell } to either store an analog signal or { HEAD ~ multiple digital signals }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD