The switch block circuit further includes a selection unit for correspondingly connecting the second group memories with {HEAD ~ the second group switching transistors} depending on {TAIL ~ an operation mode} 
The switch block circuit further includes a selection unit for correspondingly connecting the second group memories with { HEAD ~ the second group switching transistors } depending on { TAIL ~ an operation mode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL