NXP Semiconductors MWCT101 S Series, Reference Manual

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50.13.1 Debug module state in low-power modes
The following table shows the state of the debug modules in low power modes. These
terms are used:
• FF = Full functionality. In VLPR the system frequency is limited, but if a module
does not have a limitation in its functionality, it is still listed as FF.
• static = Module register states and associated memories are retained.
• OFF = Modules are powered off; module is in reset state upon wakeup.
Table 50-12. Debug module state in low-power modes
Module STOP
1
VLPR VLPS
Debug Port FF FF OFF
AHB-AP FF FF OFF
ITM FF FF OFF
TPIU FF FF OFF
DWT FF FF OFF
ETM
2
FF FF OFF
1. Debugger state in STOP1 and STOP2 is same as in STOP.
2. Present in WCT1016S only
50.14 Debug and security
When security is enabled (FSEC[SEC] != 10), the debug port capabilities are limited to
prevent exploitation of secure data. In the secure state, the debugger still has access to the
MDM-AP Status Register and can determine the current security state of the device. In
the case of a secure device, the debugger also has the capability of performing a mass
erase operation via writes to the MDM-AP Control Register. In the case of a secure
device that has mass erase disabled (FSEC[MEEN] = 10), attempts to mass erase via the
debug interface are blocked.
Chapter 50 Debug
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 1725