ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 34

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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When an external clock (11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz, 19.2MHz, 24MHz, 26MHz or 27MHz)
is input to MCKI pin, the MCKO, BICK and LRCK clocks are generated by an internal PLL circuit. The MCKO output
frequency is selected by PS1-0 bits (Table 10) and the output is enabled by MCKO bit. The BICK output frequency is
selected between 32fs or 64fs, by BCKO bit (Table 11).
MS0625-E-01
PLL Master Mode (AIN3 bit = “0”, PMPLL bit = “1”, M/S bit = “1”)
Mode
Table 10. MCKO Output Frequency (PLL Mode, MCKO bit = “1”)
0
1
2
3
AK4648
Table 11. BICK Output Frequency at Master Mode
BCKO bit
MCKI
MCKO
BICK
LRCK
SDTO
SDTI
PS1 bit
0
1
0
0
1
1
Figure 18. PLL Master Mode
256fs/128fs/64fs/32fs
32fs, 64fs
BICK Output
PS0 bit
Frequency
1fs
- 34 -
0
1
0
1
32fs
64fs
11.2896MHz, 12MHz, 12.288MHz, 13MHz,
13.5MHz, 19.2MHz, 24MHz, 26MHz,
27MHz
MCKO pin
MCLK
BCLK
LRCK
SDTI
SDTO
256fs
128fs
(default)
64fs
32fs
DSP or μP
(default)
[AK4648]
2007/06