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AK4637 Datasheet, PDF (18/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC - SPK-AMP
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[AK4637]
Parameter
Symbol
Min.
Typ.
Max.
Unit
Audio Interface Timing (DSP Mode)
Master Mode
FCK “” to BICK “” (Note 21)
tDBF 0.5x1/fBCK40 0.5x1/fBCK 0.5x1/fBCK+40 ns
FCK “” to BICK “” (Note 22)
tDBF 0.5x1/fBCK40 0.5x1/fBCK 0.5x1/fBCK+40 ns
BICK “” to SDTO (BCKP bit =“0”) tBSD
70
-
70
ns
BICK “” to SDTO (BCKP bit =“1”) tBSD
70
-
70
ns
SDTI Hold Time
tSDH
50
-
-
ns
SDTI Setup Time
tSDS
50
-
-
ns
Slave Mode
FCK “” to BICK “” (Note 21) tFCKB 0.4x1/fBCK
-
-
ns
FCK “” to BICK “” (Note 22) tFCKB 0.4x1/fBCK
-
-
ns
BICK “” to FCK “” (Note 21) tBFCK 0.4x1/fBCK
-
-
ns
BICK “” to FCK “” (Note 22) tBFCK 0.4x1/fBCK
-
-
ns
BICK “” to SDTO (BCKP bit =“0”) tBSD
-
-
80
ns
BICK “” to SDTO (BCKP bit =“1”) tBSD
-
-
80
ns
SDTI Hold Time
tSDH
50
-
-
ns
SDTI Setup Time
tSDS
50
-
-
ns
Parameter
Symbol
Audio Interface Timing (Right/Left justified &I2S)
Min.
Typ.
Max.
Unit
Master Mode
BICK “” to FCK Edge (Note 23) tBFCK
40
-
40
ns
FCK Edge to SDTO (MSB)
(Except I2S mode)
tFCKD
70
-
70
ns
BICK “” to SDTO
tBSD
70
-
70
ns
SDTI Hold Time
tSDH
50
-
-
ns
SDTI Setup Time
tSDS
50
-
-
ns
Slave Mode
FCK Edge to BICK “” (Note 23) tFCKB
50
-
-
ns
BICK “” to FCK Edge (Note 23) tBFCK
50
-
-
ns
FCK Edge to SDTO (MSB)
(Except I2S mode)
tFCKD
-
-
80
ns
BICK “” to SDTO
tBSD
-
-
80
ns
SDTI Hold Time
tSDH
50
-
-
ns
SDTI Setup Time
tSDS
50
-
-
ns
Digital Audio Interface Timing; CL=100pF
DMCLK Output Timing
Period
tSCK
-
1/(64fs)
-
s
Rising Time
tSRise
-
-
10
ns
Falling Time
tSFall
-
-
10
ns
Duty Cycle
dSCK
40
50
60
%
Audio Interface Timing
DMDAT Setup Time
tDSDS
50
-
-
ns
DMDAT Hold Time
tDSDH
0
-
-
ns
Note 21. MSBS, BCKP bits = “00” or “11”.
Note 22. MSBS, BCKP bits = “01” or “10”.
Note 23. BICK rising edge must not occur at the same time as FCK edge.
015010680-E-00
- 18 -
2015/09
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