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WM8768GEDS/V Datasheet(PDF) 29 Page - Wolfson Microelectronics plc

Part # WM8768GEDS/V
Description  24-bit, 192kHz 8-Channel DAC
PDF  38 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8768GEDS/V Datasheet(HTML) 29 Page - Wolfson Microelectronics plc

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Production Data
WM8768
w
PD Rev 4.3 July 2010
29
POWERDOWN MODE AND DAC DISABLE
Setting the PDWN register bit immediately powers down the DACs on the WM8768, overriding the
DACD powerdown bits control bits. All trace of the previous input samples is removed, but all control
register settings are preserved. When PDWN is cleared the digital filters will be reinitialised
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000010
Powerdown Control
2
PDWN
0
Power Down all DAC’s Select:
0: All DACs enabled
1: All DACs disabled
The DACs may also be powered down individually by setting the DACPD disable bits. Each Stereo
DAC channel has a separate disable DACPD[2:0]. Setting DACPD for a channel will disable the
DACs and select a low power mode.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001010
Powerdown Control
3:1
DACD[2:0]
000
DAC Disable
0001111
DAC4 Control
1
DACD4
0
DAC 4 Powerdown
{DACD4,DACD [2:0]}
DAC
CHANNEL 4
DAC
CHANNEL 3
DAC
CHANNEL 2
DAC
CHANNEL 1
0000
Active
Active
Active
Active
0001
Active
Active
Active
DISABLE
0010
Active
Active
DISABLE
Active
0011
Active
Active
DISABLE
DISABLE
0100
Active
DISABLE
Active
Active
0101
Active
DISABLE
Active
DISABLE
0110
Active
DISABLE
DISABLE
Active
0111
Active
DISABLE
DISABLE
DISABLE
1000
DISABLE
Active
Active
Active
1001
DISABLE
Active
Active
DISABLE
1010
DISABLE
Active
DISABLE
Active
1011
DISABLE
Active
DISABLE
DISABLE
1100
DISABLE
DISABLE
Active
Active
1101
DISABLE
DISABLE
Active
DISABLE
1110
DISABLE
DISABLE
DISABLE
Active
1111
DISABLE
DISABLE
DISABLE
DISABLE
Table 15 DAC Disable Control
MASTER POWERDOWN
Control bit PWRDNALL overrides the {DACD4,DACD[2:0]} bits and powers everything down
including the reference VMID. It is recommended that the DACs are powered down first before
setting this bit.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001010
Interface Control
4
PWRDNALL
0
Master Power down bit
0: Not powered down
1: Powered down



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