wm8580a Wolfson Microelectronics plc, wm8580a Datasheet - Page 73

• Manufacturer Part Number: wm8580a
• Description: Multichannel Codec With S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics plc

Production Data
POWERDOWN MODES
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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.
PD, Rev 4.7, March 2009
WM8580
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