SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
To preserve the power-management behavior of the device and allow the subsystem power and clock to be switched off by application software, the subsystem TAP must be disconnected from the ICEPick scan chain. The subsystem is then completely ignored by the debugger and the host-to-target communication is no longer affected by the state of the subsystem power and clocks. The debugger can still be informed that the disconnected subsystem entered the debug state by polling the Debug Attention status bit from ICEPick. The debugger can then insert the TAP, take control of the subsystem power and clock, and examine the system state.
This debug model is nonintrusive, because it allows the power-management behavior of the application to be preserved.