18.7.9 DFLL48M Value

Note: This register is read- and write-synchronized: DFLLSYNC.DFLLVAL must be checked to ensure the DFLLVAL register synchronization is complete.
Name: DFLLVAL
Offset: 0x24
Reset: 0x0000XXXX
Property: PAC Write-Protection, Read-Synchronized, Write-Synchronized

Bit 3130292827262524 
 DIFF[15:8] 
Access RRRRRRRR 
Reset 00000000 
Bit 2322212019181716 
 DIFF[7:0] 
Access RRRRRRRR 
Reset 0000000x 
Bit 15141312111098 
 COARSE[5:0]   
Access R/WR/WR/WR/WR/WR/W 
Reset 00000x 
Bit 76543210 
 FINE[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 0000000x 

Bits 31:16 – DIFF[15:0] Multiplication Ratio Difference

In closed-loop mode (DFLLCTRLB.MODE is written to one), this bit group indicates the difference between the ideal number of DFLL cycles and the counted number of cycles. This value is not updated in open-loop mode, and should be considered invalid in that case.

Bits 15:10 – COARSE[5:0] Coarse Value

Set the value of the Coarse Calibration register. In closed-loop mode, this field is read-only.

The DFLL48M is factory-calibrated for 48MHz. Register DFLLVAL.COARSE stores the coarse frequency calibration after reset.

Bits 7:0 – FINE[7:0] Fine Value

Set the value of the Fine Calibration register. In closed-loop mode, this field is read-only.

The DFLL48M is factory-calibrated for 48MHz. Register DFLLVAL.FINE stores the coarse frequency calibration after reset.