AK7750 Datasheet, PDF (18/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
(5) Switching characteristics
1) System clock
(AVDD=DVDD=3.0 to 3.6V,Ta= -40°C to 85°C)
Parameter
Symbol
min
Maser clock(XTI) @CKSX=”H”
a) when a crystal oscillator is used
(note 1)
CKS[1:0]=0h
fXTI
-
CKS[1:0]=1h
fXTI
-
CKS[1:0]=2h
fXTI
-
b)when an external clock is used
(note 1)
Duty factor (≤18.5MHz)
40
(>18.5MHz)
45
CKS[1:0]=0h (PLL operation range) fXTI
11.0
CKS[1:0]=1h (PLL operation range) fXTI
16.5
CKS[1:0]=2h (PLL operation range) fXTI
22.0
CKS[1:0]=3h (PLL is not used)
fXTI
33.0
Clock rise time
tCR
Clock fall time
tCF
typ
11.2896
12.288
16.9344
18.432
22.5792
24.576
50
50
max
Units
-
MHz
-
MHz
-
MHz
60
55
12.33
18.6
24.66
37.0
6
6
%
%
MHz
MHz
MHz
MHz
ns
ns
LRCLK_I,LRCLK frequency note2) fs
8
48
192
kHz
Slave mode: Clock rise time
tLR
Slave mode: Clock fall time
tLF
6
ns
6
ns
BITCLK_I ,BITCLK frequency
fBCLK
48
64
fs
(@CKSX=”H”) (note3)
Slave mode: high level width
tBCLKH
34
ns
Slave mode: high level width
tBCLKL
34
ns
Slave mode: clock rise time
tBR
6
ns
Slave mode: clock fall time
tBF
6
ns
BITCLK_I,BITCLK frequency
fBCLK
-
64
-
fs
(@CKSX=”L”,SMODE=”L”) (note 4)
Duty factor
40
50
60
%
Slave mode: high level width
tBCLKH
34
ns
Slave mode: high level width
tBCLKL
34
ns
Slave mode: clock rise time
tBR
6
ns
Slave mode: clock fall time
tBF
6
ns
note1) CKS1=CKS[1].CKS[0]=CKS0
note2) LRCLK and sampling rate ( fs ) must be identical.
note3) 48 fs is used for slave mode ( only 64 fs is available for hands-free mode )
note4) BITCLK-I or BITCLK is used as clock input. BITCLK must be precisely divided into 64 clocks
in 1 fs time.
[MS0296-E-00]
18
2005/03