wm8580a Wolfson Microelectronics plc, wm8580a Datasheet - Page 33

• Manufacturer Part Number: wm8580a
• Description: Multichannel Codec With S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
Master Digital
Attenuation
Attenuation
Attenuation
Attenuation
Attenuation
Attenuation
Attenuation
REGISTER
ADDRESS
DACR 1
DACR 2
DACR3
DACL 1
DACL 2
DACL3
Digital
Digital
Digital
Digital
Digital
Digital
R20
R21
R22
R23
R24
R25
R28
1Ch
14h
15h
16h
17h
18h
19h
BIT
7:0
7:0
7:0
7:0
7:0
7:0
7:0
8
8
8
8
8
8
8
MASTDA[7:0]
RDA1[6:0]
RDA2[7:0]
RDA3[7:0]
LDA1[7:0]
LDA2[7:0]
LDA3[7:0]
UPDATE
UPDATE
UPDATE
UPDATE
UPDATE
UPDATE
UPDATE
DAC DIGITAL VOLUME CONTROL
The DAC volume may also be adjusted in the digital domain using independent digital attenuation
control registers
Table 22 Digital Attenuation Registers
Note: The volume update circuit of the WM8580 has two sets of registers; LDAx and RDAx.
These can be accessed individually, or simultaneously by writing to MASTDA – Master
Digital Attenuation. Writing to MASTDA will overwrite the contents of LDAx and RDAx.
LABEL
Not latched
Not latched
Not latched
Not latched
Not latched
Not latched
Not latched
DEFAULT
11111111
11111111
11111111
11111111
11111111
11111111
11111111
(0dB)
(0dB)
(0dB)
(0dB)
(0dB)
(0dB)
(0dB)
Digital Attenuation control for DAC1 Left Channel (DACL1) in 0.5dB
steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for DAC1 Right Channel (DACR1) in
0.5dB steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for DAC2 Left Channel (DACL2) in 0.5dB
steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for DAC2 Right Channel (DACR2) in
0.5dB steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for DAC3 Left Channel (DACL3) in 0.5dB
steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for DAC3 Right Channel (DACR3) in
0.5dB steps. See Table 23
Controls simultaneous update of all Attenuation Latches
Digital Attenuation control for all DAC channels in 0.5dB steps. See
Table 23
Controls simultaneous update of all Attenuation Latches
0 = Store LDA1 in intermediate latch (no change to output)
1 = Apply LDA1 and update attenuation on all channels
0 = Store RDA1 in intermediate latch (no change to output)
1 = Apply RDA1 and update attenuation on all channels.
0 = Store LDA2 in intermediate latch (no change to output)
1 = Apply LDA2 and update attenuation on all channels.
0 = Store RDA2 in intermediate latch (no change to output)
1 = Apply RDA2 and update attenuation on all channels.
0 = Store LDA3 in intermediate latch (no change to output)
1 = Apply LDA3 and update attenuation on all channels.
0 = Store RDA3 in intermediate latch (no change to output)
1 = Apply RDA3 and update attenuation on all channels.
0 = Store gain in intermediate latch (no change to output)
1 = Apply gain and update attenuation on all channels.
DESCRIPTION
PD, Rev 4.7, March 2009
WM8580
33