ARM Cortex-M3

System Debug
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Figure 11-18 ITM Lock Status Register bit assignments
Table 11-27 describes the bit assignments of the ITM Lock Status Register
31
0
1
Reserved
Present
23
ByteAcc
Access
Table 11-27 ITM Lock Status Register bit assignments
Bits Field Function
[31:3] - Reserved.
[2] ByteAcc You cannot implement 8-bit lock accesses.
[1] Access Write access to component is blocked. All writes are ignored, reads are permitted.
[0] Present Indicates that a lock mechanism exists for this component.