30
DS1113F1
CS4399
4.5 Clocking Architecture
When the MCLK is supplied to the device through the XTI/MCLK pin, it must comply with the phase-noise mask shown in
. Its frequency must be one of the nominal MCLK_INT frequencies (22.5792 or 24.576 MHz), and its duty cycle
must be between 45% to 55%.
Figure 4-11. MCLK Phase Noise Mask Without PLL
When the PLL reference clock is supplied to the device through the XTI/MCLK pin, it must comply with the phase-noise
mask shown in
Figure 4-12. MCLK Phase Noise Mask With PLL