AK4951AEN Datasheet, PDF (93/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
3. EXT Slave Mode
Power Supply
(1)
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKI pin
LRCK pin
BICK pin
Example:
:^{Audio I/F Format: I2S Compatible (ADC and DAC)}
Input MCKI frequency: 256fs
Sampling Frequency: 48kHz
(1) Power Supply & PDN pin = “L”  “H”
(3)
(2)
(4)
Input
(4)
Input
Figure 61. Clock Set Up Sequence (3)
(2)Dummy Command
Addr:05H, Data:03H
Addr:06H, Data:0BH
(3) Addr:00H, Data:40H
MCKI, BICK and LRCK input
<Sequence>
(1) After Power Up: PDN pin “L” → “H”
“L” time of 200ns or more is needed to reset the AK4951A.
(2) After Dummy Command (Addr:00H, Data:00H) input, DIF1-0, CM1-0 and FS3-0 bits must be set
during this period.
(3) Power Up VCOM and Regulator: PMVCM bit = “0” → “1”
VCOM and Regulator must first be powered-up before the other block operates. Power up time is
2.0ms (max) when the capacitance of an external capacitor for the VCOM and the REGFIL pin is
2.2μF each.
(4) Normal operation starts after the MCKI, LRCK and BICK are supplied.
4. EXT Master Mode
Power Supply
(1)
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKI pin
M/S bit
(Addr:01H, D3)
LRCK pin
BICK pin
Example:
:^{Audio I/F Format: I2S Compatible (ADC and DAC)}
Input MCKI frequency: 256fs
Sampling Frequency: 48kHz
BCKO: 64fs
(1) Power Supply & PDN pin = “L”  “H”
(4)
(2)
(3)
Input
(3) MCKI input
(4)Dummy Command
Addr:01H, Data:08H
Addr:05H, Data:0BH
Addr:06H, Data:0BH
BICK and LRCK output
Output
(5) Addr:00H, Data:40H
Figure 62. Clock Set Up Sequence (4)
<Sequence>
(1) After Power Up: PDN pin “L” → “H”
“L” time of 200ns or more is needed to reset the AK4951A.
(2) MCKI is supplied.
(3) After Dummy Command (Addr:00H, Data:00H) input, DIF1-0, CM1-0, BCKO and FS3-0 bits are
set. M/S bit should be set to “1”. Then LRCK and BICK are output.
(4) Power Up VCOM and Regulator: PMVCM bit = “0” → “1”
VCOM and Regulator must first be powered-up before the other block operates. Power up time is
2.0ms (max) when both capacitances of an external capacitor for the VCOM and REGFIL pins are
2.2μF each.
016001936-E-00
- 93 -
2016/03