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In Circular Buffer mode, the Trigger Counter register specifies the number of 32-bit words to capture in the trace memory, after detection of either a rising edge on the trigin input or a trigger packet in the incoming trace stream, that is, where atid_s =
0x7D. The value programmed must be aligned to the frame length of 128 bits.
The TRG register characteristics are:
The following figure shows the bit assignments.
The following table shows the bit assignments.
Table 9-296 TRG register bit assignments
Read-As-Zero, Writes Ignored.
Trigger count. This count represents the number of 32-bit words of trace that are captured between a trigger packet and a trigger event. Software must program this register before setting CTL.TraceCaptEn bit if operating in CB mode.