| Bit15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| Access | |||||||
| Reset | |||||||
| Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| REFNUM[7:0] | |||||||
| AccessR/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
| Reset0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Number of Reference Clock Cycles
Selects the duration of a measurement in number of CLK_FREQM_REF cycles. This must be a non-zero value, i.e. 0x01 (one cycle) to 0xFF (255 cycles).