18.7.9 DFLL48M Control B

Note: In the period of 80-100 us between lock and stabilization, DFLL accuracy will be limited to +/-1.5%. After stabilization has been achieved, the accuracy will be +/-0.25%. Disabling Quick Lock will eliminate this period of inaccuracy.

Table 18-12. Register Bit Attribute Legend
Symbol	Description	Symbol	Description	Symbol	Description
R	Readable bit	HC	Cleared by Hardware	(Grey cell)	Unimplemented
W	Writable bit	HS	Set by Hardware	X	Bit is unknown at Reset
K	Write to clear	S	Software settable bit	—	—

Name:	DFLLCTRLB
Offset:	0x30
Reset:	0x00000000
Property:	PAC Write-Protected, Write-Synchronized


Bit	31	30	29	28	27	26	25	24

Access
Reset


Bit	23	22	21	20	19	18	17	16

Access
Reset


Bit	15	14	13	12	11	10	9	8

Access
Reset


Bit	7	6	5	4	3	2	1	0
	WAITLOCK		QLDIS	CCDIS		LLAW	STABLE	LOOPEN
Access	R/W		R/W	R/W		R/W	R/W	R/W
Reset	0		0	0		0	0	0

Bit 7 – WAITLOCK Wait Lock

This bit controls the DFLL48M output clock, depending on lock status:

Value	Description
0	Output clock before the DFLL is locked.
1	Output clock when DFLL is locked.

Bit 5 – QLDIS Quick Lock Disable

Value	Description
0	Quick Lock is enabled.
1	Quick Lock is disabled.

Bit 4 – CCDIS Chill Cycle Disable

Value	Description
0	Chill Cycle is enabled.
1	Chill Cycle is disabled.

Bit 2 – LLAW Lose Lock After Wake

Value	Description
0	Locks will not be lost after waking up from sleep modes if the DFLL clock has been stopped.
1	Locks will be lost after waking up from sleep modes if the DFLL clock has been stopped.

Bit 1 – STABLE Stable DFLL48M Frequency

Value	Description
0	Tune register tracks changes in output frequency.
1	Tune calibration register value will be fixed after a lock.

Bit 0 – LOOPEN Operating Mode Selection

Value	Description
0	The DFLL operates in open-loop operation.
1	The DFLL operates in closed-loop operation.