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6.24TCP2ErrorRegister(TCPERR)
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Registers
TheTCP2errorregister(TCPERR)isshowninFigure54anddescribedinTable29.Incaseofanerror,
thecoprocessorsendsaninterrupttotheC6457CPU.Thefollowingerrorsarefeedbackintheerrorword.
Figure54.TCP2ErrorRegister(TCPERR)
3116
Reserved
R-0
15141312111098
MAX
ReservedReservedACCOPINTSNR
MINTER
R-0R-0R-0R-0R-0R-0R-0
76543210
RReservedSFReservedPFERR
R-0R-0R-0R-0R-0R-0R-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table29.TCP2ErrorRegister(TCPERR)FieldDescriptions
BitFieldValueDescription
31-15ReservedReserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfieldhasnoeffect.
14MAXMINTERMax/miniteration
0Noerror
1Min_iter>max_iter
13-12ReservedReserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfieldhasnoeffect.
11ACCSpuriousTCPmemoryaccess.
0Noerror.
1TCPmemoryaccesserror:System&Parities,HardDecision,Extrinsic,orApriorimemorieswere
accessedatthewrongtime.Chapter9describestheprocessbywhichthesystemdetermines
whenEDMA3canaccessthesememories.Thememoriesshouldnotbeviewedexceptwhen
TCPEXEissetforDebugModeandtheDSPhashalted.
10OPOutputparametersloadforsharedprocessing.
0Noerror
1OutputparameterreadflagissetinSPmode
9INTInterleavertableloadforsharedprocessing.
0Noerror
1Therehasbeenarequesttoloadtheinterleavertable(interleaverflagbitsetto1)
8SNRSNRthreshold
0Noerror
1SNRthreshold>100
7RReliabilitylength
0Noerror
1Reliabilitylengtherrorduetooneofthefollowing:
•Reliabilitylength<40
•sw_r!=128inSPmodeiflong_type=1or2
•sw_r<65inSPmodeiflong_type=3
6-5Reserved0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfieldhasnoeffect.
SPRUGK1–March2009TMS320C6457Turbo-DecoderCoprocessor245
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