AK4646_11 Datasheet, PDF (20/81 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/SPK-AMP

[AK4646]
■ PLL Mode
When PMPLL bit is “1”, a fully integrated analog phase locked loop (PLL) generates a clock that is selected by the
PLL3-0 and FS3-0 bits. The PLL lock time is shown in Table 4, when the AK4646 is supplied stable clocks after PLL is
powered-up (PMPLL bit = “0” → “1”) or when the sampling frequency is changed.
1) Setting of PLL Mode
PLL3 PLL2
Mode
bit bit
0
0
0
1
0
0
2
0
0
3
0
0
6
0
1
7
0
1
12
1
1
13
1
1
Others
Others
PLL1 PLL0
bit bit
PLL
Reference
Clock Input
Pin
Input
Frequency
R and C of
VCOC pin
R[Ω] C[F]
0
0
LRCK pin
1fs
6.8k 220n
0
1
N/A
-
-
-
1
0
BICK pin
32fs
10k 4.7n
10k 10n
1
1
BICK pin
64fs
10k 4.7n
10k 10n
1
0
MCKI pin
12MHz
10k 10n
1
1
MCKI pin
24MHz
10k 10n
0
0
MCKI pin
13.5MHz
10k 10n
0
1
MCKI pin
27MHz
10k 10n
N/A
Table 4. Setting of PLL Mode (*fs: Sampling Frequency)
PLL Lock
Time
(max)
160ms
-
2ms
4ms
2ms
4ms
40ms
40ms
40ms
40ms
(default)
2) Setting of sampling frequency in PLL Mode
When PLL2 bit is “1” (PLL reference clock input is MCKI pin), the sampling frequency is selected by FS3-0 bits as
defined in Table 5.
Mode
FS3 bit
FS2 bit
FS1 bit
FS0 bit Sampling Frequency
0
0
0
0
0
8kHz
(default)
1
0
0
0
1
12kHz
2
0
0
1
0
16kHz
3
0
0
1
1
24kHz
4
0
1
0
0
7.35kHz
5
0
1
0
1
11.025kHz
6
0
1
1
0
14.7kHz
7
0
1
1
1
22.05kHz
10
1
0
1
0
32kHz
11
1
0
1
1
48kHz
14
1
1
1
0
29.4kHz
15
1
1
1
1
44.1kHz
Others
Others
N/A
Table 5. Setting of Sampling Frequency at PLL2 bit = “1” and PMPLL bit = “1” (Reference Clock = MCKI pin)
When PLL2 bit is “0” (PLL reference clock input is LRCK or BICK pin), the sampling frequency is selected by FS3 and
FS2 bits. (Table 6).
Mode ^{FS3 bit FS2 bit}
FS1 bit
FS0 bit
Sampling Frequency
Range
0
0
0
Don’t care Don’t care
7.35kHz ≤ fs ≤ 12kHz (default)
1
0
1
Don’t care Don’t care 12kHz < fs ≤ 24kHz
2
1
0
Don’t care Don’t care 24kHz < fs ≤ 48kHz
Others
Others
N/A
Table 6. Setting of Sampling Frequency at PLL2 bit = “0” and PMPLL bit = “1” PLL Slave Mode 2
(PLL Reference: Clock: LRCK or BICK pin)
MS0557-E-05
- 20 -
2011/01