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AK4634 Datasheet, PDF (11/77 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
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[AK4634]
Parameter
Symbol
min
PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 6, Figure 7)
FCK: Frequency
DSP Mode: Pulse Width High
fFCK
tFCKH
7.35
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
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 6, Figure 7)
FCK: Frequency
DSP Mode: Pulse width High
fFCK
tFCKH
7.35
tBCK−60
Except DSP Mode: Duty Cycle
duty
45
BICK: Period (PLL3-0 bit = “0001”)
tBCK
-
(PLL3-0 bit = “0010”)
tBCK
-
(PLL3-0 bit = “0011”)
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 21)
dMCK
-
FCK: Frequency
DSP Mode: Pulse width High
fFCK
tFCKH
8
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 “↑” to BICK “↑” (Note 22)
FCK “↑” to BICK “↓” (Note 23)
BICK “↑” to FCK “↑” (Note 22)
BICK “↓” to FCK “↑” (Note 23)
BICK “↑” to SDTO (BCKP bit= “0”)
BICK “↓” to SDTO (BCKP bit= “1”)
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 “↑” (Note 24)
tFCKB
50
BICK “↑” to FCK Edge (Note 24)
tBFCK
50
FCK to SDTO (MSB) (Except I2S mode)
tFSD
-
BICK “↓” 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
48
1/fFCK−tBCK
55
1/16fFCK
-
-
48
1/fFCK−tBCK
55
-
-
-
-
-
27.0
-
-
-
60
-
48
1/fFCK−tBCK
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
Rev. 0.5
- 11 -
2007/10
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