AK4632 Datasheet, PDF (65/70 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Mono CODEC with ALC & MIC/SPK/Video-AMP

ASAHI KASEI
[AK4632]
2. In case of using POP reduction circuit of AK4632.
Example:
PLL, Master Mode
Audio I/F Format :DSP Mode, BCKP=MSBS= “0”
Sampling Frequency: 8kHz
Digital Volume: -8dB
MGAIN1=SPKG1=SPKG0=BEEPA=ALC1M
=ALC1A= “0”
(1) Addr:05H, Data:00H
FS2-0 bits
(Addr:05H,
D5,D2-0)
XXXX
(1)
DACA bit
(2)
(Addr:02H, D4)
DVOL7-0 bits
(Addr:0AH, D7-0)
PSAON bit
(Addr:03H, D6)
PMDAC bit
(Addr:00H, D2)
PMAO bit
(Addr:00H, D3)
00011000
AOUT pin
XXXX
(9)
(3)
XXXXXXX
(4)
(6)
(7)
(10)
(5)
>300 ms
Normal Output
(8)
>300 ms
Figure 54. Mono Lineout Sequence
(2) Addr:02H, Data:10H
(3) Addr:0AH, Data:28H
(4) Addr:03H, Data:40H
(5) Addr:00H, Data:4CH
(6) Addr:03H, Data:00H
Playback
(7) Addr:03H, Data:40H
(8) Addr:00H, Data:40H
(9) Addr:02H, Data:00H
(10) Addr:03H, Data:00H
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS3-0 bits). When the AK4632 is PLL mode, DAC and Mono Line Amp should
be powered-up in consideration of PLL lock time after a sampling frequency is changed.
(2) Set up the path of “DAC Æ Mono Line Amp” : DACA bit: “0” → “1”
(3) Set up the digital volume (Addr: 0AH)
After DAC is powered-up, the digital volume changes from default value (0dB) to the register setting value by
the soft transition.
(4) Enter power-save mode of Mono Line Amp: AOPSN bit = “0” → “1”
(5) Power Up of DAC and Mono Line Amp: PMDAC bit = PMAO bit = “0” → “1”
AOUT pin rises up to VCOM voltage. Rise time is 200ms (max 300ms) at C=1µF.
(6) Exit power-save mode of Mono Line Amp after AOUT pin rises up. : AOPSN bit = “1” → “0”
Mono Line Amp goes to normal operation.
(7) Enter power-save mode of Mono Line Amp: AOPSN bit = “0” → “1”
(8) Power Down of DAC and Mono Line Amp: PMDAC bit = PMAO bit = “1” → “0”
AOUT pin falls down to AVSS. Fall time is 200ms (max 300ms) at C=1µF.
(9) Disable the path of “DAC Æ Mono Line Amp” : DACA bit: “1” → “0”
(10) Exit power-save mode of Mono Line Amp after AOUT pin falls down. : AOPSN bit = “1” → “0”
MS0396-E-00
- 65 -
2005/06