AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 44

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

■
When ADCPF bit = “0” and ALC2 bit = “0”, ALC block become an output digital volume (manual mode). The digital
volume’s gain is set by OVOL7-0 bits as shown in
at zero cross or zero cross time out. The zero crossing timeout period is set by ZTM1-0 bits.
When writing to the OVOL7-0 bits continually, the control register should be written by 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 a same register value as the last time. At this time, zero crossing counter has not been reset,
so it should be written by an interval less than zero crossing timeout.
■
AK4635 has 4 steps output volume in addition to the volume setting by OVOL7-0 bits. This volume is set by DATT1-0
bits as shown in
Rev. 0.6
Output Digital volume (Manual mode)
Output Digital Volume2
Table
24.
OVOL7-0bits
DATT1-0bits
EFH
F1H
F0H
92H
91H
90H
2H
1H
0H
0H
1H
2H
3H
:
:
Table 24. Output Digital Volume2 Setting
Table 23 Output Digital Volume Setting
GAIN(0dB)
GAIN(0dB)
Table
+35.625
-53.625
+35.25
+0.375
MUTE
-0.375
+36.0
-54.0
-12.0
-18.1
-6.0
0.0
0.0
:
:
23. The OVOL7-0 bits value are reflected to this output volume
- 44 -
0.375dB
6.0dB
Step
Step
(default)
(default)
[AK4635]
2007/10