The following table lists common sampling frequency in accordance with the formula of I?S clock sources.
If the system only requires a sampling frequency, the clock source can be determined by an external crystal. If two or more sampling frequencies are required, most of the chips will be limited to hardware restrictions. Each sampling frequency can only be the result of I2S clock source divider.
In the NUC140 series, for example, the I2S selects 12.288 MHz as clock source and 16 bits, and the available sampling frequency are 96K, 48K, 32K, 24K, 19.2K, 16K, 12K, 9.6K, 8K and 6K. As to the 44.1K, 22.05K and 11.025K, the clock source must be changed to 5.6448 MHz.
How to set the I2S sampling frequency and select an external crystal?
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