CS42426
6.3
Power Control (address 02h)
7
6
5
4
3
2
1
0
Reserved
PDN_PLL
PDN_ADC
Reserved
PDN_DAC3
PDN_DAC2
PDN_DAC1
PDN
6.3.1 POWER DOWN PLL (PDN_PLL)
Default = 0
Function:
When enabled, the PLL is held in a reset state. It is advised that any change of this bit be made while
the DACs are muted or the power-down bit (PDN) is enabled to eliminate the possibility of audible
artifacts.
6.3.2 POWER DOWN ADC (PDN_ADC)
Default = 0
Function:
When enabled the stereo analog to digital converter will remain in a reset state. It is advised that any
change of this bit be made while the DACs are muted or the power-down bit (PDN) is enabled to elim-
inate the possibility of audible artifacts.
6.3.3 POWER DOWN DAC PAIRS (PDN_DACX)
Default = 0
Function:
When enabled the respective DAC channel pair x (AOUTAx and AOUTBx) will remain in a reset state.
6.3.4 POWER DOWN (PDN)
Default = 1
Function:
The entire device will enter a low-power state when this function is enabled, and the contents of the
control registers are retained in this mode. The power-down bit defaults to ‘enabled’ on power-up and
must be disabled before normal operation can occur.
6.4
Functional Mode (address 03h)
7
6
5
4
3
2
1
0
DAC_FM1
DAC_FM0
ADC_FM1
ADC_FM0
Reserved
ADC_SP SEL DAC_DEM
Reserved
6.4.1 DAC FUNCTIONAL MODE (DAC_FMX)
Default = 00
00 - Single-Speed Mode (4 to 50 kHz sample rates)
01 - Double-Speed Mode (50 to 100 kHz sample rates)
10 - Quad-Speed Mode (100 to 192 kHz sample rates)
11 - Reserved
Function:
Selects the required range of sample rates for all converters clocked from the DAC serial port (DAC_SP).
Bits must be set to the corresponding sample rate range when the DAC_SP is in Master or Slave Mode.
DS604F1
43
CIRRUS [ CIRRUS LOGIC ]
