[AK4634]
4. EXT Slave Mode
Example
Audio I/F Format:MSB justified (ADC and DAC)
Input MCKI frequency: 256fs
Sampling Frequency:48kHz
MCKO: Disable
Power Supply
(1)
PDN pin
(1) Power Supply & PDN pin = “L” Æ “H”
(2)
(3)
PMVCM bit
(Addr:00H, D6)
(4)
"L"
(2) Addr:04H, Data:02H
Addr:05H, Data:00H
PMPLL bit
(Addr:01H, D0)
(5)
(5)
MCKI pin
Input
Input
(3) Addr:00H, Data:40H
FCK pin
BICK pin
MCKI, BICK and FCK input
Figure 62. Clock Set Up Sequence (4)
<Example>
(1) After Power Up: PDN pin “L” → “H”
“L” time (1) of 150ns or more is needed to reset the AK4634.
(2) DIF1-0 and FS1-0 bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” → “1”
VCOM should first be powered up before the other block operates.
(4) Power down PLL: PMPLL bit = “0”
(5) Normal operation starts after the MCKI, FCK and BICK are supplied.
MS0983-E-00
2008/07
- 79 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
