ak7742 ETC-unknow, ak7742 Datasheet - Page 11

• Manufacturer Part Number: ak7742
• Description: 24bit 2ch Adc + 24bit 4ch Dac With Audio Dsp
• Manufacturer: ETC-unknow

■
(Ta=-20ºC~70ºC; AVDD=DVDD=3.0~3.6V)
XTI
a)with a crystal oscillator
Frequency(256fs)
CKM[2:0]=
b)with an external clock
Frequency(256fs)
CKM[2:0]=
Frequency (384fs)
CKM[2:0]= 001
LRCK frequency
BICK frequency
a) CKM[2:0]= 001, 010
b) CKM[2:0]= 011
c) CKM[2:0]= 100
d) CKM[2:0]= 101
Note 23. LRCK frequency and sampling rate (fs) should be the same.
Note 24. The BICK must be divided 32, 48 or 64 clocks correctly. (BICK can be selected from 32fs, 48fs or 64fs)
Note 25. When BICK is resource of internal MCLK. The BICK must be divided 64 clocks correctly. 64fs fixed.
Note 26. When BICK is resource of internal MCLK. The BICK must be divided 32 clocks correctly. 32fs fixed.
Note 27. When BICK is resource of internal MCLK. The BICK must be divided 64 clocks correctly. 64fs fixed.
Rev.0.5b_PB
System Clock
000
000, 010
High level width
CKM[2:0]= 001
Low level width
Parameter
Duty cycle
Duty cycle
Duty cycle
Duty cycle
Frequency
Frequency
Frequency
Frequency
(Note
(Note
(Note
(Note
23)
26)
25)
27)
fs=44.1KHz
fs=44.1KHz
fs=44.1KHz
fs=48KHz
fs=48KHz
fs=48KHz
SWITCHING CHARACTERISTICS
fXTI
fXTI
Duty
fXTI
fXTI
Fs
tBCLKH
tBCLKL
fBCLK
Duty
Duty
Duty
fBCLK
fBCLK
fBCLK
Symbol
-
11
-
11.0
7.35
0.46
2.75
min
16.5
230
460
40
32
64
64
40
40
40
-
-
11.2896
16.9344
11.2896
16.9344
12.288
18.432
12.288
18.432
3.072
3.072
256
512
typ
50
48
64
64
50
32
50
64
50
6.144
max
12.4
18.6
258
516
3.1
60
96
60
60
60
-
-
MHz
MHz
MHz
MHz
MHz
MHz
Unit
kHz
kHz
kHz
%
ns
ns
%
%
%
fs
fs
fs
fs
[AK7742]
2008/08