At all other times the clock input is blocked or clamped to prevent {HEAD ~ spurious signals} or {TAIL ~ power surge transients} from altering the stored data 
At all other times the clock input is blocked or clamped to prevent { HEAD ~ spurious signals } or { TAIL ~ power surge transients } from altering the stored data
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH