DEBUG_DHCSR

Bit Field	Read/Write	Field Name	Description
31:16	W	DBGKEY	Debug key must be written to this field in order to write the rest of the register
26	R	S_RESART_S	Restart sticky status
25	R	S_RESET_ST	Core has been reset or is being rest. Bit is cleared on read.
24	R	S_RETIRE_ST	Retire sticky status
20	R	S_SDE	Secure debug enable. Indicates whether Secure invasive debug is allowed
19	R	S_LOCKUP	Indicates if core is in lockup state
18	R	S_SLEEP	Indicates if core is in sleep mode
17	R	S_HALT	Indicates is core is halted
16	R	S_REGRDY	Indicates register read/write operation is completed
5	RW	C_SNAPSTALL	Set to break a stalled memory access
3	RW	C_MASKINTS	Mask interrupts while stepping
2	RW	C_STEP	Single step the processor
1	RW	C_HALT	Halt the processor
0	RW	C_DEBUGEN	Enable halt mode debugging

Bit Field	Field Name	Value Symbol	Value Description	Hex Value
31:16	DBGKEY	DEBUG_HALT_KEY	Key to unlock DEBUG_DHCSR register	0xA05F