Information

9.14.1 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 and VLPW 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 9-7. Debug Module State in Low Power Modes
Module STOP VLPR VLPW VLPS LLS VLLSx
Debug Port FF FF FF OFF static OFF
AHB-AP FF FF FF OFF static OFF
ITM FF FF FF OFF static OFF
ETM FF FF FF OFF static OFF
ETB FF FF FF OFF static OFF
TPIU FF FF FF OFF static OFF
DWT FF FF FF OFF static OFF
9.15 Debug & Security
When security is enabled (FSEC[SEC] != 10), the debug port capabilities are limited in
order 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.
Debug & Security
K10 Sub-Family Reference Manual, Rev. 6, Nov 2011
214 Freescale Semiconductor, Inc.