TRCPDCR, PowerDown Control Register
The TRCPDCR characteristics are:
Requests the system to provide power to the trace unit.
This register is present only when ETE is implemented. Otherwise, direct accesses to TRCPDCR are RES0.
TRCPDCR is a 32-bit register.
The TRCPDCR bit assignments are:
PU, bit 
Power Up Request.
The system can remove power from the trace unit core power domain, or requests for power to the trace unit core power domain are implemented outside of the trace unit.
The system must provide power to the trace unit core power domain.
This bit is RES0.
Accessing the TRCPDCR
External debugger accesses to this register are unaffected by the OS Lock.
TRCPDCR can be accessed through the external debug interface:
This interface is accessible as follows:
- When !IsTraceCorePowered() accesses to this register generate an error response.
- Otherwise accesses to this register are RW.