MTBDWT_FCT1 field descriptions (continued)Field Description0 No match.1 Match occurred.23–4ReservedThis field is reserved.This read-only field is reserved and always has the value 0.3–0FUNCTIONFunctionSelects the action taken on a comparator match. If MTBDWT_COMP0 is used for a data value andMTBDWT_COMP1 for an address value, then MTBDWT_FCT1[FUNCTION] must be set to zero. For thisconfiguration, MTBDWT_MASK1 can be set to a non-zero value, so the combined comparators match ona range of addresses.0000 Disabled.0100 Instruction fetch.0101 Data operand read.0110 Data operand write.0111 Data operand (read + write).others Reserved. Any attempts to use this value results in UNPREDICTABLE behavior.19.32.6 MTB_DWT Trace Buffer Control Register(MTBDWT_TBCTRL)The MTBDWT_TBCTRL register defines how the watchpoint comparisons control theactual trace buffer operation.Recall the MTB supports starting and stopping the program trace based on the watchpointcomparisons signaled via TSTART and TSTOP. The watchpoint comparison signals areenabled in the MTB's control logic by setting the appropriate enable bits,MTB_MASTER[TSTARTEN, TSTOPEN]. In the event of simultaneous assertion ofboth TSTART and TSTOP, TSTART takes priority.Address: F000_1000h base + 200h offset = F000_1200hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16R NUMCOMP 0WReset 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0Memory Map and Register DefinitionKL04 Sub-Family Reference Manual, Rev. 3.1, November 2012292 Freescale Semiconductor, Inc.
