AK4646EN AKM [Asahi Kasei Microsystems], AK4646EN Datasheet - Page 74

• Manufacturer Part Number: AK4646EN
• Description: Stereo CODEC with MIC/SPK-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

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MS0557-E-02
(Addr:0AH&0DH, D7-0)
(Addr:05H, D5&D2-0)
Stereo Line Output
(Addr:00H, D2)
(Addr:00H, D3)
<Example>
(Addr:03H, D6)
(Addr:00H, D5)
OVL/R7-0 bits
PMDAC bit
(Addr:02H, D4)
ROUT pin
LOUT pin
PMBP bit
PMLO bit
LOPS bit
FS3-0 bits
DACL bit
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up the sampling frequency (FS3-0 bits). When the AK4646 is PLL mode, DAC and Stereo Line-Amp
(2) Set up the path of “DAC
(3) Set up the output digital volume (Addr: 0AH and 0DH)
(4) Enter power-save mode of Stereo Line Amp: LOPS bit = “0”
(5) Power-up DAC, MIN-Amp and Stereo Line-Amp: PMDAC = PMBP = PMLO bits = “0” → “1”
(6) Exit power-save mode of Stereo Line-Amp: LOPS bit = “1”
(7) Enter power-save mode of Stereo Line-Amp: LOPS bit: “0”
(8) Power-down DAC, MIN-Amp and Stereo Line-Amp: PMDAC = PMBP = PMLO bits = “1” → “0”
(9) Disable the path of “DAC
(10) Exit power-save mode of Stereo Line-Amp: LOPS bit = “1”
should be powered-up in consideration of PLL lock time after the sampling frequency is changed.
When OVOLC bit is “1” (default), OVL7-0 bits set the volume of both channels. After DAC is powered-up,
the digital volume changes from default value (0dB) to the register setting value by the soft transition.
The DAC outputs invalid voltage for 67/fs = 1.52ms@fs = 44.1kHz after powered-up, then it starts outputting
normal voltage. LOUT and ROUT pins rise up to VCOM voltage after PMLO bit is changed to “1”. Rise time
is 300ms (max) at C=1 μ F.
LOPS bit should be set to “0” after LOUT and ROUT pins rise up. Stereo Line-Amp goes to normal operation
by setting LOPS bit to “0”.
LOUT and ROUT pins fall down to AVSS. Fall time is 300ms (max) at C=1 μ F.
LOPS bit should be set to “0” after LOUT and ROUT pins fall down.
0,000
91H
(1)
(2)
(3)
(4)
Stereo Line Amp”: DACL bit = “0”
Stereo Line-Amp”: DACL bit = “1”
(5)
>300 ms
Figure 45. Stereo Lineout Sequence
(6)
1,111
Normal Output
91H
- 74 -
(7)
(8)
(9)
>300 ms
“0”
“1”
“0”
“1”
“1”
“0”
(10)
Example:
PLL, Master Mode
Audio I/F Format :MSB justified (ADC & DAC)
Sampling Frequency:44.1KHz
Digital Volume: 0dB
MGAIN1=SPKG1=SPKG0=BEEPL bits = “0”
(5) Addr:00H, Data:6CH
(1) Addr:05H, Data:27H
(2) Addr:02H, Data:10H
(4) Addr:03H, Data:40H
(6) Addr:03H, Data:00H
(7) Addr:03H, Data:40H
(8) Addr:00H, Data:40H
(9) Addr:02H, Data:00H
(3) Addr:0AH&0DH, Data:91H
(10) Addr:03H, Data:00H
Playback
[AK4646]
2007/05