WM8768_10 WOLFSON [Wolfson Microelectronics plc], WM8768_10 Datasheet - Page 29

• Manufacturer Part Number: WM8768_10
• Description: 24-bit, 192kHz 8-Channel DAC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Production Data
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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
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.
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.
Table 15 DAC Disable Control
REGISTER ADDRESS
REGISTER ADDRESS
REGISTER ADDRESS
{DACD4,DACD [2:0]}
Powerdown Control
Powerdown Control
Interface Control
DAC4 Control
0000010
0001010
0001111
0001010
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
BIT
BIT
3:1
BIT
2
1
4
CHANNEL 4
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
Active
Active
Active
Active
Active
Active
Active
Active
DAC
PWRDNALL
DACD[2:0]
LABEL
PDWN
DACD4
LABEL
LABEL
DEFAULT
CHANNEL 3
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DEFAULT
Active
Active
Active
Active
Active
Active
Active
Active
DEFAULT
DAC
0
000
0
0
Power Down all DAC’s Select:
DAC Disable
DAC 4 Powerdown
Master Power down bit
CHANNEL 2
0: All DACs enabled
1: All DACs disabled
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
Active
Active
Active
Active
Active
Active
Active
Active
0: Not powered down
1: Powered down
DAC
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD Rev 4.3 July 2010
CHANNEL 1
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
Active
Active
Active
Active
Active
Active
Active
Active
WM8768
DAC
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