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WM8580 Datasheet(PDF) 68 Page - Wolfson Microelectronics plc |
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WM8580 Datasheet(HTML) 68 Page - Wolfson Microelectronics plc |
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68 / 97 page  WM8580 Production Data w PD Rev 4.3 August 2007 68 POWERDOWN MODES The WM8580 has powerdown control bits allowing specific parts of the chip to be turned off when not in use. The ADC is powered down by setting the ADCPD register bit. The three stereo DACs each have a separate powerdown control bit, DACPD[2:0], allowing individual stereo DACs to be powered down when not in use. DACPD can be overwritten by setting ALLDACPD to powerdown all DACs The S/PDIF transmitter is powered down by setting SPDIFTXD. Setting SPDIFRXD powers down the S/PDIF receiver. The PLL, Oscillator and S/PDIF clock recovery circuits are powered down by setting PLLPD, OSCPD and SPDIFPD respectively. Setting all of ADCPD, DACPD[2:0], SPDIFTXD, SPDIFRXD and OUTPD[3:0] will powerdown everything except the references VMIDADC, ADCREF and VMIDDAC. These may be powered down by setting PWDN. Setting PWDN will override all other powerdown control bits. It is recommended that the ADC and DAC are powered down before setting PWDN. The default is for all powerdown bits to be set except OSCPD and PWDN. |
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