wm8595 Wolfson Microelectronics plc, wm8595 Datasheet - Page 29

• Manufacturer Part Number: wm8595
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics plc

Production Data
DAC FEATURES
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The WM8595 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 WM8595 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.
DAC1_CTRL1
DAC2_CTRL1
DAC1R_VOL
DAC2R_VOL
DAC1R_VOL
DAC2R_VOL
DAC1L_VOL
DAC2L_VOL
DAC1L_VOL
DAC2L_VOL
REGISTER
REGISTER
ADDRESS
ADDRESS
R10
0Ah
R11
0Bh
R10
0Ah
R11
0Bh
02h
07h
05h
06h
05h
06h
R2
R7
R5
R6
R5
R6
BIT
BIT
7:0
7:0
7:0
7:0
8
8
8
8
8
8
DAC1R_VU
DAC2R_VU
DAC1L_VU
DAC2L_VU
DAC1_EN
DAC2_EN
_VOL[7:0]
_VOL[7:0]
_VOL[7:0]
_VOL[7:0]
DAC1R
DAC2R
LABEL
LABEL
DAC1L
DAC2L
DEFAULT
DEFAULT
11001000
0
0
0
DAC1 Enable
0 = DAC disabled
1 = DAC enabled
DAC2 Enable
0 = DAC2 disabled
1 = DAC2 enabled
DAC Digital Volume
0000 0000 = -100dB
0000 0001 = -99.5dB
0000 0010 = -99dB
…0.5dB steps
1100 1000 = 0dB
…0.5dB steps
1101 1111 = +11.5dB
111X XXXX = +12dB
DAC Digital Volume Update
0 = Latch DAC volume setting into Register
Map but do not update volume
1 = Latch DAC volume setting into Register
Map and update left and right channels
simultaneously
DESCRIPTION
DESCRIPTION
PD, Rev 4.1, April 2010
WM8595
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