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WM8591GEDS/RV Arkusz danych(PDF) 49 Page - Wolfson Microelectronics plc |
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WM8591GEDS/RV Arkusz danych(HTML) 49 Page - Wolfson Microelectronics plc |
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49 / 51 page ![]() Production Data WM8591 w PD Rev 4.0 December 2005 49 USE OF ADC/DAC SYNCHRONIZER When operating the ADC and DAC simultaneously, the ADC/DAC synchronizer should be configured to optimise internal clock phasing and device performance. The synchronizer is controlled by registers R11 and R28 and recommended settings are described in Table 14. In order for the clock synchronizer to operate, DAC_MCLK and ADC_MCLK must be phase locked with coincident clock edges. CONFIGURATION REGISTER SETTINGS DAC fs (kHz) DAC MCLK RATE ADC fs (kHz) ADC MCLK RATE 48 768fs 48 384fs 1 1 1 * 0 0 0 96 384fs 48 384fs 1 1 1 * 0 0 0 32 1152fs 48 384fs 0 0 0 0 0 1 ** 44.1 768fs 48 384fs 0 0 0 0 0 0 48 256fs 48 256fs 0 1 1 * 1 0 0 48 512fs 48 256fs 0 1 0 1 1 0 48 512fs 48 256fs 0 1 1 * 1 0 0 96 256fs 48 256fs 0 1 1 * 1 0 0 32 768fs 48 256fs 0 0 0 0 0 0 Table 14 Synchronizer Configurations * In those modes where ADCMCLK2DAC is set, the DAC is driven by the clock signal applied to the ADC_MCLK pin. If the DAC is operated in Master mode, the DACRATE bits (R12 [6:4]) must be set to match the ADC_MCLK rate. ** In those modes where DACMCLK2ADC is set, the ADC is driven by the clock signal applied to the DAC_MCLK pin. If the ADC is operated in Master mode, the ADCRATE bits (R12 [2:0]) must be set to match the DAC_MCLK rate. |
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