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AK4631 Datasheet, PDF (13/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP | |||
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ASAHI KASEI
[AK4631]
Parameter
Symbol
min
PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 6, Figure 7)
FCK: Frequency
fFCK
7.35
DSP Mode: Pulse Width High
tFCKH tBCK-60
Except DSP Mode: Duty Cycle
duty
45
BICK: Period
tBCK 1/64fFCK
Pulse Width Low
tBCKL
240
Pulse Width High
tBCKH
240
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 6, Figure 7)
FCK: Frequency
fFCK
7.35
DSP Mode: Pulse width High
tFCKH tBCK-60
Except DSP Mode: Duty Cycle
duty
45
BICK: Period (PLL3-0 = â0001â)
tBCK
(PLL3-0 = â0010â)
tBCK
(PLL3-0 = â0011â)
tBCK
Pulse Width Low
tBCKL 0.4 x tBCK
Pulse Width High
tBCKH 0.4 x tBCK
PLL Slave Mode (PLL Reference Clock: MCKI pin) (Figure 8)
MCKI Input: Frequency
fCLK
11.2896
Pulse Width Low
fCLKL 0.4/fCLK
Pulse Width High
fCLKH 0.4/fCLK
MCKO Output:
Frequency
fMCK
Duty Cycle except fs=29.4kHz, 32kHz
dMCK
40
fs=29.4kHz, 32kHz (Note 23)
dMCK
FCK: Frequency
fFCK
8
DSP Mode: Pulse width High
tFCKH tBCK-60
Except DSP Mode: Duty Cycle
duty
45
BICK: Period
tBCK 1/64fFCK
Pulse Width Low
tBCKL 0.4 x tBCK
Pulse Width High
tBCKH 0.4 x tBCK
Audio Interface Timing
DSP Mode: (Figure 9, Figure 10)
FCK âââ to BICK âââ (Note 24)
FCK âââ to BICK âââ (Note 25)
BICK âââ to FCK âââ (Note 24)
BICK âââ to FCK âââ (Note 25)
BICK âââ to SDTO (BCKP = â0â)
BICK âââ to SDTO (BCKP = â1â)
SDTI Hold Time
SDTI Setup Time
tFCKB
tFCKB
tBFCK
tBFCK
tBSD
tBSD
tSDH
tSDS
0.4 x tBCK
0.4 x tBCK
0.4 x tBCK
0.4 x tBCK
50
50
Except DSP Mode: (Figure 12)
FCK Edge to BICK âââ (Note 26)
tFCKB
50
BICK âââ to FCK Edge (Note 26)
tBFCK
50
FCK to SDTO (MSB) (Except I2S mode)
tFSD
BICK âââ to SDTO
tBSD
SDTI Hold Time
tSDH
50
SDTI Setup Time
tSDS
50
typ
8
8
1/16fFCK
1/32fFCK
1/64fFCK
256 x fFCK
50
33
max
26
1/fFCK-tBFCK
55
1/16fFCK
48
1/fFCK-tBFCK
55
27.0
60
48
1/fFCK-tBFCK
55
1/16fFCK
80
80
80
80
Units
kHz
ns
%
ns
ns
ns
kHz
ns
%
ns
ns
ns
ns
ns
MHz
ns
ns
kHz
%
%
kHz
ns
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MS0317-J-01
- 13 -
2004/11
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