AK4632 Datasheet, PDF (64/70 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Mono CODEC with ALC & MIC/SPK/Video-AMP

ASAHI KASEI
[AK4632]
„ MONO LINEOUT
1. In case of using an external mute circuit.(Compatible with AK4536/AK4630)
FS3-0 bits _XXXX
(Addr:05H,
D5,D2-0)
(1)
DACA bit
(2)
(Addr:02H, D4)
(3)
DVOL7-0 bits
(Addr:0AH, D7-0)
00011000
PMDAC bit
(Addr:00H, D2)
(4)
PMAO bit
(Addr:00H, D3)
XXXX
XXXXXXX
(6)
(5)
Example:
PLL, Master Mode
Audio I/F Format :DSP Mode, BCKP=MSBS= “0”
Sampling Frequency: 8kHz
Digital Volume: -8dB
(1) Addr:05H, Data:00H
(2) Addr:02H, Data:10H
(3) Addr:0AH, Data:28H
(4) Addr:00H, Data:4CH
Playback
AOUT pin
Hi-Z
Normal Output
Hi-Z
(5) Addr:00H, Data:40H
Figure 53. Mono Lineout Sequence
(6) Addr:02H, 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) Power Up of DAC and Mono Line Amp: PMDAC bit = PMAO bit = “0” → “1”
When DAC and Mono Line Amp are powered-up, the pop noise occurs from AOUT pin. Therefore AOUT pin
should be muted by external circuit.
(5) Power Down of DAC and Mono Line Amp: PMDAC bit = PMAO bit = “1” → “0”
When DAC and Mono Line Amp are powered-down, the pop noise occurs from AOUT pin. Therefore AOUT
pin should be muted by external circuit.
(6) Disable the path of “DAC Æ Mono Line Amp”
DACA bit: “1” → “0”
MS0396-E-00
- 64 -
2005/06