AK4649 Datasheet, PDF (27/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
■ PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
A reference clock of PLL is selected among the input clocks to the MCKI, BICK or LRCK pin. The required clock for the
AK4649 is generated by an internal PLL circuit. Input frequency is selected by PLL3-0 bits (Table 4).
a) PLL reference clock: MCKI pin
BICK and LRCK inputs must be synchronized with MCKO output. The phase between MCKO and LRCK dose not
matter. The MCKO pin outputs the frequency selected by PS1-0 bits (Table 9) and the output is enabled by MCKO bit.
Sampling frequency can be selected by FS3-0 bits (Table 5)
AK4649
MCKI
MCKO
BICK
LRCK
SDTO
SDTI
11.2896MHz, 12MHz, 13.5MHz,
24MHz, 27MHz
DSP or μP
256fs/128fs/64fs/32fs
≥ 32fs
1fs
MCLK
BCLK
LRCK
SDTI
SDTO
Figure 15. PLL Slave Mode 1 (PLL Reference Clock: MCKI pin)
MS1023-E-01
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2010/08