WM8594_07 Wolfson Microelectronics Ltd., WM8594_07 Datasheet - Page 29

• Manufacturer Part Number: WM8594_07
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics Ltd.

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DAC FEATURES
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The WM8594 includes two 24-bit DACs with independent clocks and independent data inputs. The
DACs include digital volume control with zero cross and soft mute, de-emphasis support, and the
capability to select the output channels to be stereo or a range of mono options. The DACs are
enabled by writing to DAC1_EN and DAC2_EN.
Table 16 DAC Enable Control
DIGITAL VOLUME CONTROL
The WM8594 DACs include independent digital volume control, allowing the digital gain to be
adjusted between -100dB and +12dB in 0.5dB steps. All four DAC channels can be controlled
independently. Alternatively, global update bits allow the user to write all volume changes before the
volume is updated.
Volume control includes optional zero cross functionality. When zero cross is enabled, volume
changes are not applied until the output level crosses VMID. Zero cross helps to prevent pop and
click noise when changing volume settings.
Table 15 Audio Interface Control
DAC1_CTRL1
DAC2_CTRL1
ADC_CTRL1
REGISTER
REGISTER
ADDRESS
ADDRESS
R13
0Dh
02h
07h
R2
R7
BIT
BIT
1:0
3:2
4
5
8
8
ADC_BCP
ADC_LRP
DAC1_EN
DAC2_EN
FMT[1:0]
WL[1:0]
LABEL
LABEL
ADC_
ADC_
DEFAULT
DEFAULT
10
10
0
0
0
0
ADC Audio Interface Format
00 = Right Justified
01 = Left Justified
10 = I
11 = DSP
ADC Audio Interface Word Length
00 = 16-bit
01 = 20-bit
10 = 24-bit
11 = 32-bit (not available in Right Justified
mode)
ADC BCLK Polarity
0 = ADCBCLK not inverted - data latched on
rising edge of BCLK
1 = ADCBCLK inverted - data latched on
falling edge of BCLK
ADC LRCLK Polarity
0 = ADCLRCLK not inverted
1 = ADCLRCLK inverted
DAC1 Enable
0 = DAC disabled
1 = DAC enabled
DAC2 Enable
0 = DAC2 disabled
1 = DAC2 enabled
2
S
DESCRIPTION
DESCRIPTION
PP Rev 1.0 January 2007
WM8594
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