ak5702 AKM Semiconductor, Inc., ak5702 Datasheet - Page 45

• Manufacturer Part Number: ak5702
• Description: 4-channel Adc With Pll & Mic-amp
• Manufacturer: AKM Semiconductor, Inc.

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The input digital volume becomes a manual mode when ALC4 bit is “0” and ALCA/B bit is “0”. This mode is used in the
case shown below.
IVA/BL7-0 and IVA/BR7-0 bits set the gain of the volume control (Table 36). The IVOL value is changed at zero
crossing or timeout. Zero crossing timeout period is set by ZTMA/B1-0 bits.
If IVA/BL7-0 or IVA/BR7-0 bits are written during PMADA/BL=PMADA/BR bits = “0”, IVOL operation starts with the
written values at the end of the ADC initialization cycle after PMADA/BL or PMADA/BR bit is changed to “1”.
MS0623-E-00
Input Digital Volume (Manual Mode)
1. After exiting reset state, set-up the registers for the ALC operation (ZTMA/B1-0, LMTHA/B and etc)
2. When the registers for the ALC operation (Limiter period, Recovery period and etc) are changed.
3. When IVOL is used as a manual volume.
For example; when the change of the sampling frequency.
IVA/BL7-0
IVA/BR7-0
EFH
F1H
F0H
92H
91H
90H
03H
02H
01H
00H
:
:
Table 36. Input Digital Volume Setting
GAIN (dB)
+35.625
−53.625
+35.25
+0.375
−0.375
−53.25
MUTE
+36.0
−54
0.0
:
:
- 45 -
0.375dB
Step
(default)
[AK5702]
2007/06