ASAHI KASEI
[AK4644]
Units
Parameter
Symbol
min
typ
max
Audio Interface Timing (DSP Mode)
Master Mode
tDBF
tDBF
tBSD
tBSD
tSDH
tSDS
0.5 x tBCK 0.5 x tBCK + 40
0.5 x tBCK 0.5 x tBCK + 40
ns
ns
ns
ns
ns
ns
LRCK “↑” to BICK “↑” (Note 28)
LRCK “↑” to BICK “↓” (Note 29)
BICK “↑” to SDTO (BCKP bit = “0”)
BICK “↓” to SDTO (BCKP bit = “1”)
SDTI Hold Time
0.5 x tBCK − 40
0.5 x tBCK − 40
-
-
-
-
70
70
-
−70
−70
50
SDTI Setup Time
50
-
Slave Mode
tLRB
tLRB
tBLR
tBLR
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
LRCK “↑” to BICK “↑” (Note 28)
LRCK “↑” to BICK “↓” (Note 29)
BICK “↑” to LRCK “↑” (Note 28)
BICK “↓” to LRCK “↑” (Note 29)
BICK “↑” to SDTO (BCKP bit = “0”)
BICK “↓” to SDTO (BCKP bit = “1”)
SDTI Hold Time
-
-
-
50
50
80
80
-
SDTI Setup Time
-
Audio Interface Timing (Right/Left justified & I2S)
Master Mode
tMBLR
tLRD
-
-
40
70
ns
ns
BICK “↓” to LRCK Edge (Note 28)
LRCK Edge to SDTO (MSB)
(Except I2S mode)
−40
−70
tBSD
tSDH
tSDS
-
-
-
70
-
-
ns
ns
ns
BICK “↓” to SDTO
−70
50
50
SDTI Hold Time
SDTI Setup Time
Slave Mode
tLRB
tBLR
tLRD
50
50
-
-
-
-
-
-
80
ns
ns
ns
LRCK Edge to BICK “↑” (Note 29)
BICK “↑” to LRCK Edge (Note 30)
LRCK Edge to SDTO (MSB)
(Except I2S mode)
tBSD
tSDH
tSDS
-
50
50
-
-
-
80
-
-
ns
ns
ns
BICK “↓” to SDTO
SDTI Hold Time
SDTI Setup Time
Note 28. MSBS, BCKP bits = “00” or “11”.
Note 29. MSBS, BCKP bits = “01” or “10”.
Note 30. BICK rising edge must not occur at the same time as LRCK edge.
MS0477-E-01
2006/10
- 14 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
