AK4646EZ Datasheet, PDF (20/78 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/SPK-AMP

[AK4646EZ]
■ 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 PLL1 PLL0
Mode
bit bit bit bit
PLL
Reference
Clock Input
Pin
Input
Frequency
R and C of
VCOC pin
R[Ω] C[F]
PLL Lock
Time
(max)
0
0
0
0
0
LRCK pin
1fs
6.8k 220n 160ms
1
0
0
0
1
N/A
-
-
-
-
2
0
0
1
0
BICK pin
32fs
10k 4.7n
2ms
10k 10n
4ms
3
0
0
1
1
BICK pin
64fs
10k 4.7n
2ms
10k 10n
4ms
6
0
1
1
0
MCKI pin
12MHz
10k 10n 40ms
7
0
1
1
1
MCKI pin
24MHz
10k 10n 40ms
12
1
1
0
0
MCKI pin
13.5MHz
10k 10n
40ms
13
1
1
0
1
MCKI pin
27MHz
10k 10n 40ms
Others
Others
N/A
Table 4. Setting of PLL Mode (*fs: Sampling Frequency, N/A: Not available)
(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
(N/A: Not available)
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
x
x
7.35kHz ≤ fs ≤ 12kHz (default)
1
0
1
x
x
12kHz < fs ≤ 24kHz
2
1
0
x
x
24kHz < fs ≤ 48kHz
Others
Others
N/A
(x: Don’t care, N/A: Not available)
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)
MS0630-E-00
- 20 -
2007/06