LC89075W-H SANYO [Sanyo Semicon Device], LC89075W-H Datasheet - Page 21

• Manufacturer Part Number: LC89075W-H
• Description: Digital Audio Interface Receiver with Stereo ADC and Audio Selector
• Manufacturer: SANYO [Sanyo Semicon Device]

9.5 Soft Mute/Attenuator
• The LC89075W-H incorporates a digital volume that can adjust from 0dB to -63.5dB and -∞dB.
• The digital volume is set with the ADVOL[7:0] register. When the ADVOL[7:0] register setting is changed, the
• When “ADSMUTE=1”, soft mute operation is performed to attenuate the volume from the ADVOL[7:0] register
• When mute is canceled during mute execution, the process is stopped and the gain returns to 0dB in 0.25dB steps.
• When mute is set again during mute canceled, the cancel process is stopped and the mute process is performed to -
volume changes according to the ADFDSP[2:0] register setting. The volume changes the gain in 0.25dB steps.
setting value to -63.5dB according to the ADFDSP[2:0] register setting, and then to -∞dB (0 data). The gain changes
in 0.25dB steps during soft mute operation.
∞dB.
Attenuation
ADSMUTE
DATAOUT
(State)
*1: The time required to attenuate from 0dB to -∞dB when “ADVOL[7:0]=00h”.
ADFDSP[2:0]
0dB
000
001
010
011
100
101
110
111
-63.5
-∞
ADFDSP[1:0]
Table 9.5 ADC Output Volume Fade Slope Settings
Table 9.4 ADC Output Volume Gain Settings
0 data
ADVOL [7:0]
03h-FDh
Figure 9.3 Soft Mute Timing Chart
FEh
00h
01h
02h
FFh
1/fs (initial value)
Fade Slope
Reserved
Reserved
ADFDSP[1:0]
Direct
16/fs
2/fs
4/fs
8/fs
LC89075W-H
0dB
0 (initial value)
Gain [dB]
-0.25
-0.50
-63.5
• • •
0dB to -∞dB Transition Time (Reference)*1
-∞
-∞
0 data
1024/fs
2048/fs
4096/fs
256/fs
512/fs
1/fs
-
-
0 data
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