AK7752 Datasheet, PDF (13/23 Pages) Asahi Kasei Microsystems – Audio/Hands Free DSP with Stereo CODEC

[AK7752]
(5) Switching Characteristcis
1) System Clock
(Ta=-40°C~85°C; AVDD, DVDD=3.0~3.6V)
Parameter
Symbol
min
typ
max
XTI
CKM Mode 0-6
a) with a Crystal Oscillator:
Frequency (CKM Mode 0/2)
Frequency (CKM Mode 1/3)
fXTI
-
11.2896
-
12.288
fXTI
-
24.576
-
b) with an External Clock
Duty Cycle
40
50
60
Frequency (CKM Mode 0/2)
fXTI
11.0
12.4
Frequency (CKM Mode 1/3)
fXTI
22
24.8
Clock Rise Time
tCR
6
Clock Fall Time
tCF
6
SYNC_I Frequency (Note 28)
Fs
7.35
8
48
Clock rise time
tLR
6
Clock fall time
tLF
6
BITCLK_I Frequency
High Level Width
tBCLKH
120
Low Level Width
tBCLKL
120
Clock Rise Time
tBR
6
Clock Fall Time
tBF
6
a) CKM Mode 2/3 (Note 29)
fBCLK
32
64
Duty Cycle
40
50
60
Frequency (CKM Mode 2/3)
0.23
3.2
b) CKM Mode 4
(Note 30)
fBCLK
-
32
-
Duty Cycle
40
50
60
Frequency (CKM Mode 4)
fBCLK
230
256
258
c) CKM Mode 5/6 (Note 31)
fBCLK
-
64
-
Duty Cycle
40
50
60
Frequency (CKM Mode 5)
Frequency (CKM Mode 6)
fBCLK
460
512
516
fBCLK
2.75
3.072
3.1
Note 28. SYNC_I frequency and sampling rate (fs) should be the same.
Note 29. When BITCLK_I is 32fs, I/O interface format has some limitation.
Note 30. When BITCLK_I is a source of master clock, it should be 32 times fs correctly.
Note 31. When BITCLK_I uses as a source of master clock, it should be 64 times fs correctly.
Units
MHz
MHz
%
MHz
MHz
ns
ns
kHz
ns
ns
ns
ns
ns
ns
fs
%
MHz
fs
%
kHz
fs
%
kHz
MHz
MS0578-E-01-PB
- 13 -
2007/09