{HEAD ~ The above described signals} enable {TAIL ~ the write module} to continuously write as many blocks into the memory as can be accommodated therein and enable the read module to continuously read as many blocks of data as are available in the memory 
enable
{ HEAD ~ The above described signals } enable { TAIL ~ the write module } to continuously write as many blocks into the memory as can be accommodated therein and enable the read module to continuously read as many blocks of data as are available in the memory
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH