AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 43

• Manufacturer Part Number: AK4635
• Description: 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

■
When ADCPF bit = “1” and ALC1 bit = “0”, ALC block becomes an input digital volume (manual mode). The digital
volume’s gain is set by IVOL7-0 bits as shown in
out. The zero crossing timeout period is set by ZTM1-0 bits.
When writing to the IVOL7-0 bits continually, the control register should be written in an interval more than zero
crossing timeout. If not, zero crossing counter could be reset at each time and volume is not be changed. However, it could
be ignored when writing the same register value as the last time. At this time, zero crossing counter has not been reset, so
it should be written in an interval less than zero crossing timeout.
Rev. 0.6
Input Digital Volume (Manual Mode)
IVOL7-0bits
EFH
F1H
F0H
92H
91H
90H
2H
1H
0H
:
:
Table 22. Input Digital Volume Setting
GAIN(0dB)
Table
+35.625
-53.625
+35.25
+0.375
MUTE
-0.375
+36.0
-54.0
0.0
:
:
22. The IVOL value is changed at zero cross or zero cross time
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0.375dB
Step
(default)
[AK4635]
2007/10