alc203-lf Realtek Semiconductor Corporation, alc203-lf Datasheet - Page 46

• Manufacturer Part Number: alc203-lf
• Description: Two-channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

10. Application Circuit
The application circuit is for design reference only. System designers are suggested to visit Realtek’s web site to download the
latest application circuits. To get the best compatibility in hardware design and software driver, any modifications of application
circuits should be confirmed by Realtek.
Two-Channel AC’97 2.3 Audio Codec
Vol-Mute
GPIO Volume Control for ALC203
(No Jack Detection Function)
R54
4.7K
C19
10u
+5VA
Vol-Down
+
R53
4.7K
+3.3VDD
Arrangement of Jack Detection Pin
For ALC203
pin43=GPIO0 / JD_LINE-OUT
pin44=GPIO1 / JD_LINE-IN
pin45=ID0#
C20
1u
100K@203
Vol-Up
Crystal Saving:
R8,R4=0; Y1,C45,C46=X (EXT-14.288MHz clock)
R8,R4=X; Y1=24.576M, C45,C46=22p (24.576MHz crystal)
R63
100K@203
+3.3VDD
R55
R56
GPIO0
GPIO1
R64
SPDIFI
SPDIFO
0
0
Spilt by DGND
GPIO1
GPIO0
HP-OUT-L
HP-OUT-R
R65
R66
EXT 14.318MHz
R4
0@203
0@203
VREFOUT3
C23
C26
0@EXT-14.318M
ID0#/JD0
LINE-OUT-L
LINE-OUT-R
+3.3VDD
100u
100u
+5VAUX
C43
10u
0@EXT-14.318M
R8
37
38
39
40
41
42
43
44
45
46
47
48
0@203/250/202/202A
C5
C12
VREFOUT2
Filter Connection Schematic
R41
+
MONO-O
AVDD2
HP-OUT-L
NC
HP-OUT-R
AVSS2
GPIO0
GPIO1
ID0#/JD0
XTLSEL
SPDIFI/EAPD
SPDIFO
1u
1u
C44
0.1u
C45
22P
ALC203/250/101/202/202A
Y1
24.576MHz
C46
22P
C67
42
C31
1u@202/202A
1u@202/202A
C14
1000P
R9
22
C50
22P
C10
1000P
R10
22
C42
0.1u
+
10u
C1
+
C6
10u
+5VA
DGND
Reserved for MIC sensing accuracy
For 203(D), R55=6.8k~8.2k
For 203(E) / 250, R55= X
R55@203/250
6.8k~8.2k
LINE-IN-R
LINE-IN-L
CD-GND
PHONE
AC97-SYNC
AC97-SDIN
AC97-BCLK
AC97-SDOUT
AUX-R
AUX-L
Tied at one point only under
the codec or near the codec
CD-R
MIC2
MIC1
CD-L
JD1
JD2
C16
1u
C12A1
AC97-RESET#
24
23
22
21
20
19
18
17
16
15
14
13
U6
VREFOUT
+
C15
10u
1u
1u@101/202/202A
1u@101/202/202A
C41
C21
C22
C27
C28
C30
C17
C13
ALC203 DataSheet
1u
AGND
1u
1u
C24
C25
1u
1u
1u
C37
C39
AUX-IN Header
1u
1u
100u@203/250
100u@203/250
R7
C12B1
100P
4
3
2
1
R1
R2
R3
LINE-IN-R
LINE-IN-L
J1
0
0
0
0
R12A1
1K
1u@202/202A
C29
1u@202/202A
R12B1 10K
C18
AUX-R
AUX-L
MIC2-IN
MIC1-IN
R34
R35
Audio-From-Modem
Signal-From-PCSPK
Rev1.6
J4
VEDIO-IN Header
4
3
2
1
4
3
2
1
0@203/250
0@203/250
CD-IN Header
J2
JD1
JD2