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AK4635 Datasheet, PDF (15/81 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP | |||
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[AK4635]
Parameter
EXT Master Mode (Figure 6)
MCKI Frequency: 256fs
512fs
1024fs
Pulse Width Low
Pulse Width High
FCK Frequency (MCKI = 256fs)
(MCKI = 512fs)
(MCKI = 1024fs)
Duty Cycle
BICK: Period (BCKO1-0 bit = â00â)
(BCKO1-0 bit = â01â)
(BCKO1-0 bit = â10â)
Duty Cycle
Audio Interface Timing
DSP Mode: (Figure 7, Figure 8)
FCK âââ to BICK âââ (Note 29)
FCK âââ to BICK âââ (Note 30)
BICK âââ to SDTO (BCKP bit = â0â)
BICK âââ to SDTO (BCKP bit = â1â)
SDTI Hold Time
SDTI Setup Time
Except DSP Mode: (Figure 9)
BICK âââ to FCK Edge
FCK to SDTO (MSB)
(Except I2S mode)
BICK âââ to SDTO
SDTI Hold Time
SDTI Setup Time
Symbol
fCLK
fCLK
fCLK
tCLKL
tCLKH
fFCK
fFCK
fFCK
dFCK
tBCK
tBCK
tBCK
dBCK
tDBF
tDBF
tBSD
tBSD
tSDH
tSDS
tBFCK
tFSD
tBSD
tSDH
tSDS
min
1.8816
3.7632
7.5264
0.4/fCLK
0.4/fCLK
7.35
7.35
7.35
-
-
-
-
-
0.5 x tBCKâ40
0.5 x tBCKâ40
â70
â70
50
50
â40
â70
â70
50
50
typ
2.048
4.096
8.192
-
-
8
8
8
50
1/16fFCK
1/32fFCK
1/64fFCK
50
0.5 x tBCK
0.5 x tBCK
-
-
-
-
-
-
-
-
-
max
12.288
13.312
13.312
-
-
48
26
13
-
-
-
-
-
Units
MHz
MHz
MHz
ns
ns
kHz
kHz
kHz
%
ns
ns
ns
%
0.5 x tBCK + 40 ns
0.5 x tBCK +40 ns
70
ns
70
ns
-
ns
-
ns
40
ns
70
ns
70
ns
-
ns
-
ns
Note 28. Duty Cycle = (the width of âLâ)/(the period of clock)*100
Note 29. MSBS, BCKP bits = â00â or â11â
Note 30. MSBS, BCKP bits = â01â or â10â
Note 31. BICK rising edge must not occur at the same time as FCK edge.
Rev. 0.6
- 15 -
2007/10
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