[AK4675]
MS0963-E-00
2008/05
- 52 -
ミ
PLL Mode (PMPLL bit = “1”)
When PMPLL bit is “1”, an 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
, when the AK4675 is supplied stable clock after PLL is
powered-up (PMPLL bit = “0”
→
“1”) or sampling frequency is changed. When AIN3 bit = “1”, the PLL is not available.
1) Setting of PLL Mode
R and C of
VCOC pin
Mode
PLL3
bit
PLL2
bit
PLL1
bit
PLL0
bit
PLL Reference
Clock Input Pin
Input
Frequency
R[
Ω
]
C[F]
PLL Lock
Time
(max)
0 0 0 0 0 LRCK
pin
1fs 6.8k
220n
160ms
10k 4.7n
2ms
2 0 0 1 0 BICK
pin
32fs
10k 10n
4ms
10k 4.7n
2ms
3 0 0 1 1 BICK
pin
64fs
10k 10n
4ms
4 0 1 0 0 MCKI
pin
11.2896MHz
10k
4.7n
40ms
5 0 1 0 1 MCKI
pin
12.288MHz
10k
4.7n
40ms
6 0 1 1 0 MCKI
pin 12MHz 10k
10n 40ms
(default)
7 0 1 1 1 MCKI
pin 24MHz 10k
10n 40ms
8 1 0 0 0 MCKI
pin 19.2MHz
10k
4.7n
40ms
12 1 1 0 0 MCKI
pin 13.5MHz 10k
10n 40ms
13 1 1 0 1 MCKI
pin 27MHz 10k
10n 40ms
14 1 1 1 0 MCKI
pin 13MHz 10k
220n 60ms
15 1 1 1 1 MCKI
pin 26MHz 10k
220n 60ms
Others
Others
N/A
Table 4. Setting of PLL Mode (*fs: Sampling Frequency)
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
Mode
FS3 bit
FS2 bit
FS1 bit
FS0 bit
Sampling Frequency
0 0 0 0 0
8kHz
1 0 0 0 1 12kHz
2 0 0 1 0 16kHz
3 0 0 1 1 24kHz
5 0 1 0 1 11.025kHz
7 0 1 1 1 22.05kHz
10
1 0 1 0 32kHz
11
1 0 1 1 48kHz
15
1 1 1 1 44.1kHz
(default)
Others Others
N/A
Table 5. Setting of Sampling Frequency at PMPLL bit = “1” (Reference Clock = MCKI pin)