34.12.3 Digital-Frequency Locked Loop (DFLL48M) Characteristics
The following tables provide the characteristics of the DFLL48M.
| Symbol | Parameter | Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| fOUT | Output frequency | DFLLVAL.COARSE = DFLL48M COARSE CAL DFLLVAL.FINE = 512 over [-40, +125]C, over [2.7, 3.6]V | 44.50 | 48.00 | 51.75 | MHz |
| fOUT | Output frequency | DFLLVAL.COARSE = DFLL48M COARSE CAL DFLLVAL.FINE = 512 at Ta = 25°C, over [2.7, 3.6]V | 46.60 | 48.00 | 49.40 | MHz |
| IDFLL | Power consumption on VDDIN | DFLLVAL.COARSE = DFLL48M COARSE CAL DFLLVAL.FINE = 512 | - | 403 | 457 | µA |
| tSTARTUP | Startup time | DFLLVAL.COARSE = DFLL48M COARSE CAL DFLLVAL.FINE = 512 fOUT within 90 % of final value | - | 8 | 12 | µs |
| Symbol | Parameter | Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| fOUT | Average Output frequency | fREF = XOSC32K 32.768 kHz, 100
ppm DFLLMUL = 1464 |
47.50 | 48.00 | 48.44 | MHz |
| fREF | Reference frequency | 0.732 | 32.768 | 33 | kHz | |
| IDFLL | Power consumption on VDDIN | fREF = XOSC32K 32.768 kHz, 100 ppm | - | 457 | - | μA |
| tLOCK | Lock time |
fREF = XOSC32K 32.768 kHz , 100 ppm DFLLMUL = 1464 DFLLVAL.COARSE = DFLL48M COARSE CAL DFLLVAL.FINE = 512 DFLLCTRL.BPLCKC = 1 DFLLCTRL.QLDIS = 0 DFLLCTRL.CCDIS = 1 DFLLMUL.FSTEP = 10 |
- | 350 | - | μs |
Note:
- Refer to the revision C/revision B errata related to the DFLL48M.
- All parts are tested in production to be able to use the DFLL as the main CPU clock in DFLL Closed Loop mode with an external XOSC32K reference.