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5.40INTDSTnInterruptRateControlRegisters(INTDSTn_RATE_CNTL)
SRIORegisters
Thereareeightoftheseregisters.
Figure96.INTDSTnInterruptRateControlRegisters(INTDSTn_RATE_CNTL)
31-16
COUNT_DOWN_VALUE
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
15-0
COUNT_DOWN_VALUE
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
Table70.INTDSTnInterruptRateControlRegisters(INTDSTn_RATE_CNTL)FieldDescriptions
BitFieldValueDescription
31-0COUNT_DOWN_Therateatwhichaninterruptcanbegeneratediscontrollableforeachphysicalinterrupt
VALUEdestination.Ratecontrolisimplementedwithaprogrammabledown-counter.Thecounterreloads
andimmediatelystartsdown-countingeachtimetheCPUwritestheseregisters.Oncetherate
controlcounterregisteriswritten,andthecountervaluereacheszero(notetheCPUmaywritezero
immediatelyforazerocount),theinterruptpulsegenerationlogicisallowedtofireasinglepulseif
anybitsinthecorrespondingICSRregisterbitsareset(orbecomesetafterthezerocountis
reached).
SPRU976–March2006SerialRapidIO(SRIO)141
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