Reset Timing
Timing Waveform
The following figure shows the typical timing waveform.
Timing Parameters
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| fRING_OSC | Ring oscillator frequency. | 20 | 25 | 30 | MHz |
| tLOCK | PLL lock-in time1. | 0.5 | 0.6 | 0.75 | ms |
| nRESET | PLL reset pulse width in clock cycle. | – | 2 | – | cycle |
Note: You may observe that the PLL could not lock in time
after a reset. The design addresses this condition by asserting an active-low
reset pulse to PLL automatically. In a worst-case scenario, it may require a
longer time before the PLL locks.
1 Refer device datasheet for PLL lock in
time, tLOCK