AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 29

• Manufacturer Part Number: AK4635
• Description: 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

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A reference clock of PLL is selected among the input clocks to the MCKI, BICK or FCK pin. The required clock to the
AK4635 is generated by an internal PLL circuit. Input frequency is selected by PLL3-0 bits. When BICK input frequency
is 16fs, the audio interface format supports Mode 0 only (DSP Mode).
BICK and FCK inputs should be synchronized with MCKO output. The phase between MCKO and FCK is not important.
MCKO pin outputs the frequency selected by FS3-0 bits
Rev. 0.6
a) PLL reference clock: MCKI pin
PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
Figure 24. PLL Slave Mode 1 (PLL Reference Clock: MCKI pin)
AK4635
MCKI
MCKO
BICK
FCK
SDTO
SDTI
16fs, 32fs, 64fs
256fs
1fs
(Table
- 29 -
12MHz, 13.5MHz,
24MHz, 27MHz
5)
MCLK
BCLK
FCK
SDTI
SDTO
DSP or μP
[AK4635]
2007/10