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3.4.1. Writes to TMC registers

Table 3.52 shows the conditions necessary to write to each TMC register. Writing to the TMC under conditions other than those listed results in Unpredictable behavior. In Table 3.52, X indicates that any value is permitted.

Table 3.52. Permitted register writes
Write accesses to TMC registers
RegisterTraceCaptEnTMCReadyMODESG
RSZ[a]01XX
STS - MemErrX1XX
RRDRead-only
RRP01XX
RWP01XX
TRG01XX
CTLXXXX
RWD01XX
MODE01XX
LBUFLEVELRead-only
CBUFLEVELRead-only
BUFWM01XX
RRPHI01XX
RWPHI01XX
AXICTL01XX
DBALO01XX
DBAHI01XX
FFSRRead-only
FFCR - DrainBuffer[b]11CB-[c]
FFCR - StopOnTrigEvt1XCBX
0XXX
FFCR - StopOnFlXXXX
FFCR - TrigOnFlXXXX
FFCR - TrigOnTrigEvt1XCBX
0XXX
FFCR - TrigOnTrigInXXXX
FFCR - FlushManXXXX
FFCR - FOnTrigEvt1XCBX
0XXX
FFCR - FOnFlInXXXX
FFCR - EnTI01XX
FFCR - EnFt01XX
PSCR01XX
ITATBMDATA001XX
ITATBMCTR2Read-only
ITATBMCTR101XX
ITATBMCTR001XX
ITMISCOP001XX
ITTRFLINRead-only
ITATBDATA0Read-only
ITATBCTR201XX
ITATBCTR1Read-only
ITATBCTR0Read-only
ITCTRL01XX
CLAIMSETXXXX
CLAIMCLRXXXX
LOCKACCESSXXXX
LOCKSTATUSRead-only
AUTHSTATUSRead-only
DEVIDRead-only
DEVTYPERead-only
PERIPHID4Read-only
PERIPHID5Read-only
PERIPHID6Read-only
PERIPHID7Read-only
PERIPHID0Read-only
PERIPHID1Read-only
PERIPHID2Read-only
PERIPHID3Read-only
COMPID0Read-only
COMPID1Read-only
COMPID2Read-only
COMPID3Read-only

[a] RO in ETR configuration, and RW in ETB and ETF configurations.

[b] ETF configuration only.

[c] SG applicable in ETR configuration only.


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