[AK4634]
■ Mono Lineout
Example:
PLL Master Mode
Audio I/F Format: MSB justified
Sampling Frequency: 16kHz
LOVL bit = “0”
ALC2 : OFF, OVOL = “91H “
ALC2 setting:Refer to Table 33
HPF : ON (fc=150Hz)
5 band EQ : OFF
FS3-0 bits
XXXX
XXXX
(Addr:05H,
D5, D2-0)
(1)
(11)
DACA bit
(Addr:02H, D4)
(2)
(1) Addr:05H, Data:A2H
(2) Addr:02H, Data:10H
(3) Addr:03H, Data:02H
(4) Addr:07H, Data:00H
(5) Addr:0AH, Data:91H
(6) Addr:03H, Data:42H
(7) Addr:00H, Data:CCH
(8) Addr:03H, Data:02H
Playback
(3)
ADCPF bit
0
0 or 1
0 or 1
(Addr:03H, D0)
PFDAC bit
(Addr:03H, D1)
1
0
(4)
ALC2 Control
(Addr:07H)
0 or 1
(5)
OVOL7-0 bits
(Addr:0AH, D7-0)
XXH
XXH
AOPS bit
(Addr:03H, D6)
(6)
(8)
(9)
(12)
PMDAC bit
(Addr:00H, D2)
(7)
(10)
PMPFIL bit
(Addr:00H, D7)
(9) Addr:03H, Data:42H
(10) Addr:00H, Data:40H
(11) Addr:02H, Data:00H
(12) Addr:03H, Data:02H
PMAO bit
(Addr:00H, D3)
>300 ms
>300 ms
Normal Output
AOUT pin
Figure 64. Mono Lineout Sequence
<Example>
In case of using digital volume in manual mode
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up the sampling frequency (FS3-0 bits). When the AK4634 is PLL mode, DAC, Programmable Filter and
Mono Line Amp should be powered-up in consideration of PLL lock time after the sampling frequency is
changed.
(2) Set up the path of “DACA → Mono Line Amp”
DACA bit: “0” → “1”
(3) Set up the path: ADCPF bit = “0”, PFDAC bit = “1”
(4) ALC2 Disable: ALC2 bit = “0”
(5) Set up the digital volume (Addr: 0AH)
(6) AOUT power save mode: AOPS bit: “0” → “1”
(7) Power-up of DAC, Programmable Filter and Mono Line Amp:
PMDAC bit = PMPFIL bit = PMAO bit = “0” → “1”
AOUT pin goes to “H”. It takes 300ms (max) when C = 1µF
(8) Exit power save mode of AOUT: AOPS bit = “1” → “0”
Set up AOPS bit after AOUT became “H”, then the AOUT pin starts outputting data.
(9) Enter power save mode of AOUT: AOPS bit= “0” → “1”
(10)Power –down the DAC, Programmable Filter and Mono Line Amp:
PMDAC bit = PMPFIL bit = PMAO bit = “1” Æ “0”
The AOUT pin starts going to “L”. It takes 300ms(max) when C = 1μF.
(11)Disable the path of “DAC → Mono Line Amp”: DACA bit= “1” → “0”
(12)Exit power save mode of AOUT: AOPS bit=“1” → “0”
Set up AOPS bit after AOUT became “L”.
MS0983-E-00
2008/07
- 81 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
