The ITM_TPR characteristics are:
Enables an operating system to control the stimulus ports that are accessible by user code.
- Usage constraints
You can only write to this register in privileged mode.
This register is available if the ITM is configured in your implementation.
See Table 10.1.
Figure 10.1 shows the ITM_TPR bit assignments.
Table 10.2 shows the ITM_TPR bit assignments.
Bit mask to enable tracing on ITM stimulus ports:
bit  = stimulus ports [7:0]
bit  = stimulus ports [15:8]
bit  = stimulus ports [23:16]
bit  = stimulus ports [31:24].