AK4695 Datasheet, PDF (100/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
■ Stereo Line Input Recording
FS3-0 bits
(Addr:00H, D3-0)
0010
MIC Gain Control
(Addr:04H)
(1)
22H
Input Signal Select
(Addr:10H, D3-0)
0000
PMADC1-0 bits
(Addr:19H, D1-0)
(2)
(3)
(4)
PMMPA bit
(Addr:19H, D6)
0010
22H
1010
(6)
PMDSP bit
PMPFIL1-0 bits
(Addr:1AH, D4, D1-0)
ADC Output
Data
(5)
“L” Output
>1059/fs
Initialize
Normal State
(8)
(7)
“L” Output
Example:
Audio I/F Format: MSB justified
Sampling Frequency: 48kHz
MIC AMP Gain: +6dB
ALC: Off
(1) Addr:00H, Data:22H
(2) Addr:04H, Data: 22H
(3) Addr:10H, Data: 0AH
(4) Addr:19H, Data:53H
(5) Addr:1AH, Data:13H
(6) Addr:19H, Data:13H
Recording
(7) Addr:1AH, Data:00H
(8) Addr:19H, Data:00H
Figure 58. Stereo Line Input Recording Sequence
(Line Input Recording: AUXINL/R  ADC1  Programmable Filter  Audio I/F  SDTO1)
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS3-0 bits). ADC and Programmable Filter must be powered-up in consideration of
VCOM rise time.
(2) Set up MIC gain (Addr: 04H)
(3) Set up MIC input selector (Addr: 10H)
(4) Power up ADC1 and MIC power supply A: PMMPA = PMAD1-0 bits = “0”  “1”
MMODE bit must be set to “1”. The initialization cycle time of ADC is 1059/fs=22ms @ fs=48kHz, ADRST
bit = “0”. The ADC outputs “0” data during the initialization cycle.
(5) Power up Programmable Filter: PMDSP = PMPFIL1-0 bits = “0”“1”
(6) Power down MIC power supply A: PMMPA bit = “1”  “0”
Power down the MIC power supply A after the initialization cycle of ADC1 (1059/fs) is finished.
(7) Power down Programmable Filter: PMDSP = PMPFIL1-0 bits = “1”“0”
(8) Power down ADC1: PMAD1-0 bits = “1”  “0”
MS1463-E-01
- 100 -
2014/12