AK4637 Datasheet, PDF (86/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC - SPK-AMP

[AK4637]
3. EXT Slave Mode
Power Supply
(1)
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKI pin
FCK pin
BICK pin
(3)
(2)
Example:
:^{Audio I/F Format: I2S Compatible (ADC and DAC)}
Input MCKI frequency: 256fs
Sampling Frequency: 4 8kHz
(1) Power Supply & PDN pin = “L”  “H”
(4)
Input
(4)
Input
Figure 68. Clock Set Up Sequence (3)
(2)Dummy Command
Addr:05H, Data:00H
Addr:06H, D3-2 bits = “10”
Addr:07H, Data:03H
(3) Addr:00H, Data:40H
MCKI, BICK and FCK input
<Sequence>
(1) After Power Up: PDN pin “L” → “H”
“L” time of 200ns or more is needed to reset the AK4637.
(2) After Dummy Command (Addr:00H, Data:00H) input, CM1-0, FS3-2, MSBS,BCKP and DIF1-0
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 is 2.2μF (AVDD ≤
3.6V), 4.7μF(AVDD > 3.6V) and the REGFIL pin is 2.2μF.
(4) Normal operation starts after the MCKI, FCK and BICK are supplied.
4. EXT Master Mode
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKI pin
M/S bit
(Addr:01H, D3)
FCK pin
BICK pin
(1)
(4)
(2)
(3)
Example:
:^{Audio I/F Format: I2S Compatible (ADC and DAC)}
Input MCKI frequency: 256fs
Sampling Frequency: 4 8kHz
BCKO: 64fs
(1) Power Supply & PDN pin = “L”  “H”
Input
(2) MCKI input
(3)Dummy Command
Addr:01H, Data:08H
Addr:05H, Data:02H
Addr:06H, D3-2 bits = “10”
Addr:07H, Data:03H
Output
BICK and FCK output
(4) Addr:00H, Data:40H
Figure 69. 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 AK4637.
(2) MCKI is supplied.
(3) After Dummy Command (Addr:00H, Data:00H) input, BCKO1-0, CM1-0, FS3-2, MSBS,BCKP
and DIF1-0 bits are set. M/S bit should be set to “1”. Then FCK 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 is 2.2μF (AVDD ≤
3.6V), 4.7μF(AVDD > 3.6V) and REGFIL pins are 2.2μF.
015010680-E-00
- 86 -
2015/09