PXS20RM Datasheet, PDF (1138/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Nexus Port Controller (NPC)
34.5.3.1 Enabling the NPC TAP controller
Assertion of the power-on reset signal, entry into censored mode, or setting JCOMP to a value other than
the NPC enable encoding resets the NPC TAP controller. When not in power-on reset or censored mode,
the NPC TAP controller is enabled by driving JCOMP with the NPC enable value and exiting the
Test-Logic-Reset state. Loading the NEXUS-ENABLE instruction then grants access to Nexus debug.
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PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor