Other Parts Discussed in Thread: LM49350
Hi everybody,
I am trying to find out the reason of a white noise, which it is being generated when I do the following configuration:
-The input MCLK pin is connected to the output of a 12MHz oscillator.
-My PLL_1 settings are as follows: PLL1_CLK_SEL = 0, PLL1_M = 4, PLL1_N = 32, PLL1_N_MOD = 0, PLL1_P1 = 24, PLL1_P2 = 24. (M = 2.5, N = 32, N_MOD = 0, P = 12.5).
-With the PLL configuration described above I think I am getting 12.288MHz.
-After that I configure the input clocks of ADC and DAC with the PLL1_OUTPUT2 and with the PLL1_OUTPUT1 respectively.
-The audio quality required is 48K stero with 16-bit per sample.
-I want to sample the input signals of Right MIC and connect this output to the DAC and after that to the Class-D amplifier, all of this because I want to perform some DSP effect to this signal.
-So, I configure the ADC_INPUT with MICR_ADCR and MICL_ADCL inputs.
-ADC_BASIC_OSR = 128 of oversampling, ADC_CLK_SEL = 3, similar configuration for DAC.
-ADC_CLK_DIV and DAC_CLK_DIV = 1
-DAC_INPUT = ADC_L and ADC_R
-CLASS_D_OUTPUT = DACR_LS and DACL_LS
Regards,
Jesus Zendejas
