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5.71PortLocalAckIDStatusCSRn(SPn_ACKID_STAT)
SRIORegisters
Eachofthefourportsissupportedbyaregisterofthistype(seeTable144).TheportlocalackIDstatus
CSRn(SPn_ACKID_STAT)isshowninFigure134anddescribedinTable145.
Table144.SPn_ACKID_STATRegistersandtheAssociatedPorts
RegisterAddressOffsetAssociatedPort
SP0_ACKID_STAT1148hPort0
SP1_ACKID_STAT1168hPort1
SP2_ACKID_STAT1188hPort2
SP3_ACKID_STAT11A8hPort3
Figure134.PortLocalAckIDStatusCSRn(SPn_ACKID_STAT)
312928242316
ReservedINBOUND_ACKIDReserved
R-0R/W-0R-0
15131287340
ReservedOUTSTANDING_ACKIDReservedOUTBOUND_ACKID
R-0R/W-0R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=Valueafterreset
Table145.PortLocalAckIDStatusCSRn(SPn_ACKID_STAT)FieldDescriptions
BitFieldValueDescription
31–29Reserved0Theseread-onlybitsreturn0swhenread.
28–24INBOUND_ACKID00000b–11111bInputportnextexpectedackIDvalue
23–13Reserved0Theseread-onlybitsreturn0swhenread.
12–8OUTSTANDING_ACKID00000b–11111bOutputportunacknowledgedackIDstatus.Nextexpectedacknowledge
controlsymbolackIDfieldthatindicatestheackIDvalueexpectedinthe
nextreceivedacknowledgecontrolsymbol.
7–5Reserved0Theseread-onlybitsreturn0swhenread.
4–0OUTBOUND_ACKID00000b–11111bOutputportnexttransmittedackIDvalue.Softwarewritingthisvaluecan
forceretransmissionofoutstandingunacknowledgedpacketsinorderto
manuallyimplementerrorrecovery.
SerialRapidIO(SRIO) 202SPRUE13A–September2006
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