AK4648 Datasheet, PDF (34/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
■ PLL Master Mode (AIN3 bit = “0”, PMPLL bit = “1”, M/S bit = “1”)
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).
AK4648
11.2896MHz, 12MHz, 12.288MHz, 13MHz,
13.5MHz, 19.2MHz, 24MHz, 26MHz,
27MHz
DSP or μP
MCKI
MCKO
BICK
LRCK
SDTO
SDTI
256fs/128fs/64fs/32fs
32fs, 64fs
1fs
MCLK
BCLK
LRCK
SDTI
SDTO
Figure 18. PLL Master Mode
Mode
PS1 bit
PS0 bit
MCKO pin
0
0
0
256fs
(default)
1
0
1
128fs
2
1
0
64fs
3
1
1
32fs
Table 10. MCKO Output Frequency (PLL Mode, MCKO bit = “1”)
BCKO bit
BICK Output
Frequency
0
32fs
(default)
1
64fs
Table 11. BICK Output Frequency at Master Mode
MS0625-E-01
- 34 -
2007/06