ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 24

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
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 5, whenever the AK4644 is supplied to a stable clocks after
PLL is powered-up (PMPLL bit = “0” → “1”) or sampling frequency changes. When AIN3 bit = “1”, the PLL is not
available.
1) Setting of PLL Mode
2) Setting of sampling frequency in PLL Mode
When PLL reference clock input is MCKI pin, the sampling frequency is selected by FS3-0 bits as defined in Table 6.
When PLL reference clock input is LRCK or BICK pin, the sampling frequency is selected by FS3 and FS1-0 bits. (See
Table 7) FS2 bit is “don’t care”.
Table 7. Setting of Sampling Frequency at PLL2 bit = “0” and PMPLL bit = “1” (Reference Clock = LRCK or BICK pin)
MS0477-E-01
Others
Mode
PLL Mode (AIN3 bit = “0”, PMPLL bit = “1”)
12
13
0
1
2
3
4
5
6
7
Table 6. Setting of Sampling Frequency at PLL2 bit = “1” and PMPLL bit = “1” (Reference Clock = MCKI pin)
PLL3
Others
Mode
Others
bit
Mode
0
0
0
0
0
0
1
1
10
11
14
15
0
0
0
1
2
3
4
5
6
7
0
1
2
3
6
7
Others
PLL2
bit
0
0
0
0
1
1
1
1
1
1
FS3 bit
FS3 bit
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
PLL1
bit
0
0
1
1
0
0
1
1
0
0
Table 5. Setting of PLL Mode (*fs: Sampling Frequency)
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
PLL0
FS2 bit
bit
0
1
0
1
0
1
0
1
0
1
FS2 bit
0
0
0
0
1
1
1
1
0
0
1
1
Others
Clock Input Pin
PLL Reference
Others
LRCK pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
MCKI pin
BICK pin
BICK pin
FS1 bit
N/A
N/A
0
0
1
1
1
1
FS1 bit
0
0
1
1
0
0
1
1
1
1
1
1
- 24 -
FS0 bit
11.2896MHz
0
1
0
1
0
1
12.288MHz
Frequency
13.5MHz
12MHz
24MHz
27MHz
Input
32fs
64fs
FS0 bit
1fs
-
0
1
0
1
0
1
0
1
0
1
0
1
Sampling Frequency Range
12kHz < fs ≤ 16kHz
16kHz < fs ≤ 24kHz
24kHz < fs ≤ 32kHz
32kHz < fs ≤ 48kHz
8kHz < fs ≤ 12kHz
7.35kHz ≤ fs ≤ 8kHz
Sampling Frequency
R[Ω]
6.8k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
R and C of
VCOC pin
-
N/A
11.025kHz
22.05kHz
7.35kHz
14.7kHz
29.4kHz
44.1kHz
12kHz
16kHz
24kHz
32kHz
48kHz
8kHz
N/A
220n
C[F]
4.7n
4.7n
4.7n
4.7n
4.7n
4.7n
10n
10n
10n
10n
-
PLL Lock
160ms
(max)
40ms
40ms
40ms
40ms
40ms
40ms
Time
2ms
4ms
2ms
4ms
Default
-
Default
[AK4644]
Default
2006/10