| Description | When TraceCaptEn=1, this register indicates the current fill level of the trace memory in 32_bit words. When TraceCaptEn=0, reading this register returns a value of 0x00000000. This register is not available if the TMC is programmed for Scatter_Gather operation in ETR configuration - in this case, reading this register returns a value of 0x00000000. This register is particularly useful in the FIFO modes, in which the pointers change dynamically due to read and write of trace data into trace memory through hardware. It would not be possible for the debugger to deduce the fill level of the trace memory merely by reading the pointer registers. The fill level information is mainly useful for performance analysis. |
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