[AK4634]
Parameter
Symbol
min
typ
max
Units
PLL Slave Mode (PLL Reference Clock: FCK pin) (Figure 6, Figure 7)
FCK: Frequency
DSP Mode: Pulse Width High
Except DSP Mode: Duty Cycle
BICK: Period
fFCK
tFCKH
duty
7.35
8
-
-
-
-
-
48
kHz
ns
tBCK−60
45
1/fFCK−tBCK
55
%
tBCK
1/64fFCK
0.4 x tBCK
0.4 x tBCK
1/16fFCK
ns
Pulse Width Low
Pulse Width High
tBCKL
tBCKH
-
-
ns
ns
PLL Slave Mode (PLL Reference Clock: BICK pin) (Figure 6, Figure 7)
FCK: Frequency
DSP Mode: Pulse width High
fFCK
tFCKH
duty
7.35
8
48
kHz
ns
tBCK−60
-
1/fFCK−tBCK
Except DSP Mode: Duty Cycle
BICK: Period (PLL3-0 bit = “0001”)
(PLL3-0 bit = “0010”)
45
-
55
-
%
tBCK
tBCK
tBCK
tBCKL
tBCKH
-
1/16fFCK
ns
-
1/32fFCK
-
ns
(PLL3-0 bit = “0011”)
-
1/64fFCK
-
ns
Pulse Width Low
0.4 x tBCK
0.4 x tBCK
-
-
-
ns
Pulse Width High
-
ns
PLL Slave Mode (PLL Reference Clock: MCKI pin) (Figure 8)
MCKI Input: Frequency
Pulse Width Low
Pulse Width High
MCKO Output:
fCLK
fCLKL
fCLKH
12
-
-
-
27.0
MHz
ns
0.4/fCLK
0.4/fCLK
-
-
ns
Frequency
fMCK
dMCK
dMCK
fFCK
-
256 x fFCK
-
kHz
%
Duty Cycle except fs=29.4kHz, 32kHz
fs=29.4kHz, 32kHz (Note 18)
FCK: Frequency
40
-
50
33
-
60
-
%
8
48
kHz
ns
DSP Mode: Pulse width High
Except DSP Mode: Duty Cycle
BICK: Period
tFCKH
duty
tBCK−60
45
-
1/fFCK−tBCK
-
55
%
tBCK
1/64fFCK
0.4 x tBCK
0.4 x tBCK
-
1/16fFCK
ns
Pulse Width Low
tBCKL
tBCKH
-
-
-
ns
Pulse Width High
-
ns
Audio Interface Timing
DSP Mode: (Figure 9, Figure 10)
FCK “↑” to BICK “↑” (Note 19)
FCK “↑” to BICK “↓” (Note 20)
BICK “↑” to FCK “↑” (Note 19)
BICK “↓” to FCK “↑” (Note 20)
BICK “↑” to SDTO (BCKP bit= “0”)
BICK “↓” to SDTO (BCKP bit= “1”)
SDTI Hold 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
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
-
-
-
50
50
80
80
-
SDTI Setup Time
-
Except DSP Mode: (Figure 12)
FCK Edge to BICK “↑” (Note 21)
BICK “↑” to FCK Edge (Note 21)
FCK to SDTO (MSB) (Except I2S mode)
BICK “↓” to SDTO
tFCKB
tBFCK
tFSD
tBSD
tSDH
tSDS
50
50
-
-
50
50
-
-
-
-
-
-
-
-
80
80
-
ns
ns
ns
ns
ns
ns
SDTI Hold Time
SDTI Setup Time
-
MS0983-E-00
2008/07
- 11 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
