The mutex registers can be configured as {TAIL ~ sets} of mutex request registers and {HEAD ~ mutex release registers} 
The mutex registers can be configured as { TAIL ~ sets } of mutex request registers and { HEAD ~ mutex release registers }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD