{HEAD ~ A data processing system} has a single configurable write buffer within {TAIL ~ a peripheral interface unit} that is shared among multiple peripherals 
{ HEAD ~ A data processing system } has a single configurable write buffer within { TAIL ~ a peripheral interface unit } that is shared among multiple peripherals
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH