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AK4635 Datasheet, PDF (13/81 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
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[AK4635]
Parameter
Symbol
min
typ
PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 10, Figure 11)
FCK: Frequency
DSP Mode: Pulse Width High
fFCK
7.35
8
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
-
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 10, Figure 11)
FCK: Frequency
DSP Mode: Pulse width High
fFCK
7.35
8
tFCKH tBCK−60
-
Except DSP Mode: Duty Cycle
duty
45
-
BICK: Period (PLL3-0 bit = “0001”)
tBCK
-
1/16fFCK
(PLL3-0 bit = “0010”)
tBCK
-
1/32fFCK
(PLL3-0 bit = “0011”)
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: MCKI pin) (Figure 12)
MCKI Input: Frequency
fCLK
11.2896
-
Pulse Width Low
fCLKL 0.4/fCLK
-
Pulse Width High
fCLKH 0.4/fCLK
-
MCKO Output:
Frequency
fMCK
-
256 x fFCK
Duty Cycle except fs=29.4kHz, 32kHz
dMCK
40
50
fs=29.4kHz, 32kHz (Note 28)
dMCK
-
33
FCK: Frequency
DSP Mode: Pulse width High
fFCK
8
-
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 13, Figure 14)
FCK “↑” to BICK “↑” (Note 29)
tFCKB 0.4 x tBCK
-
FCK “↑” to BICK “↓” (Note 30)
tFCKB 0.4 x tBCK
-
BICK “↑” to FCK “↑” (Note 29)
tBFCK 0.4 x tBCK
-
BICK “↓” to FCK “↑” (Note 30)
tBFCK 0.4 x tBCK
-
BICK “↑” to SDTO (BCKP bit= “0”)
tBSD
-
-
BICK “↓” to SDTO (BCKP bit= “1”)
tBSD
-
-
SDTI Hold Time
tSDH
50
-
SDTI Setup Time
tSDS
50
-
Except DSP Mode: (Figure 16)
FCK Edge to BICK “↑” (Note 31)
tFCKB
50
-
BICK “↑” to FCK Edge (Note 31)
tBFCK
50
-
FCK to SDTO (MSB) (Except I2S mode)
tFSD
-
-
BICK “↓” to SDTO
tBSD
-
-
SDTI Hold Time
tSDH
50
-
SDTI Setup Time
tSDS
50
-
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. 0.6
- 13 -
2007/10
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