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i.MX6 and jitter for audio

Question asked by Philippe VALLE on Jul 4, 2014
Latest reply on Jul 8, 2014 by Philippe VALLE

Hi all, we use i.MX6 for audio application. i.MX6 generate master clock for bit rate like 44.1 for audio cd quality.

We use PLL4 (also referred to as an Audio PLL) - This is a fractional multiplier PLL used

for generating a low jitter and high precision audio clock with standardized audio

frequencies. The PLLs oscillator frequency range is from 650MHz to 1300MHz, and

the frequency resolution is better than 1Hz. This clock is mainly used as a clock for

serial audio interfaces and as a reference clock for external audio codecs. It is

equipped with a divider on its output and can generate divided by 1, 2 or 4 from the

PLL VCO frequency.

Question we have a low jitter, but we want to quantify this value (nano sec , pico sec) ?