ak4634 AKM Semiconductor, Inc., ak4634 Datasheet - Page 13

• Manufacturer Part Number: ak4634
• Description: 16-bit Mono Codec With Alc & Mic/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

Parameter
EXT Master Mode
MCKI Frequency: 256fs
FCK Frequency (MCKI = 256fs)
BICK: Period (BCKO1-0 bit = “00”)
Audio Interface Timing
Note 21. Duty Cycle = (the width of “L”)/(the period of clock)*100
Note 22. MSBS, BCKP bits = “00” or “11”
Note 23. MSBS, BCKP bits = “01” or “10”
Note 24. BICK rising edge must not occur at the same time as FCK edge.
Rev. 0.5
DSP Mode:
Except DSP Mode:
Duty Cycle
SDTI Hold Time
SDTI Setup Time
FCK “↑” to BICK “↑”
FCK “↑” to BICK “↓”
BICK “↑” to SDTO (BCKP bit = “0”)
BICK “↓” to SDTO (BCKP bit = “1”)
SDTI Hold Time
SDTI Setup Time
BICK “↓” to FCK Edge
FCK to SDTO (MSB)
BICK “↓” to SDTO
Pulse Width Low
Pulse Width High
Duty Cycle
(BCKO1-0 bit = “01”)
(BCKO1-0 bit = “10”)
(MCKI = 512fs)
(MCKI = 1024fs)
(Figure
512fs
1024fs
(Except I
(Figure
(Figure
3,
Figure
2
2)
S mode)
(Note
(Note
5)
4)
22)
23)
Symbol
tCLKH
tCLKL
tBFCK
dBCK
dFCK
fCLK
fCLK
fCLK
fFCK
fFCK
fFCK
tBCK
tBCK
tBCK
tSDH
tSDH
tDBF
tDBF
tBSD
tBSD
tBSD
tSDS
tFSD
tSDS
- 13 -
0.5 x tBCK−40
0.5 x tBCK−40
0.4/fCLK
0.4/fCLK
1.8816
3.7632
7.5264
7.35
7.35
7.35
min
−70
−70
−40
−70
−70
50
50
50
50
-
-
-
-
-
0.5 x tBCK
0.5 x tBCK
1/16fFCK
1/32fFCK
1/64fFCK
2.048
4.096
8.192
typ
50
50
8
8
8
-
-
-
-
-
-
-
-
-
-
-
0.5 x tBCK + 40
0.5 x tBCK +40
12.288
13.312
13.312
max
48
26
13
70
70
40
70
70
-
-
-
-
-
-
-
-
-
-
-
[AK4634]
2007/10
Units
MHz
MHz
MHz
kHz
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%