Kontron COMe Starterkit Eval T2 - Manual (Page 107)

COM Express Interfaces
2.15.1. Reference Schematics
2.15.1.1. High Definition Audio
Figure 39: HDA Example Schematic
PICMG ® COM Express ® Carrier Board Design Guide Draft Rev. 2.0 / December 6, 2013 107/218
LINE1-R
MIC1-JD
MIC1-L
MIC1-R
MIC1-VREFO-R
MIC1-VREFO-L
LINE1-JD
LINE1-L
Sense A
Sense B
FRONT-L
S/PDIF-OUT
FRONT-R
MIC1-R
MIC1-L
LINE1-R
LINE1-L
LINE2-L
FRONT-JD
LINE1-JD
MIC1-JD
MIC1-VREFO-R
MIC1-VREFO-L
FRONT-JD
FRONT-R
FRONT-L
+5VA
+5VA
+5VA
+3.3VD
VCC_12V
VCC_5V_SBY
VCC_3V3
CEX AC_SDOUT
CEX AC_BITCLK
CEX AC_SDIN0
CEX AC_SYNC
CEX AC_RST#
CEX SPKR
In order to avoid recognizing incorrect of JD,
all of JD resistors should be placed as close
as possible to the sense pin of codec.
ANALOG I/O CONNECTOR
Use 1K-Ohm may enhance audio ESDprotection.
AGND DGND
Tied at one point only under
the codec or near the codec
S/PDIF-IN
AUDIO POWER
AUDIO CODEC - ALC888
Sense B: Jack detection for MIC2 & LINE2
NOTE: please show REALTEK
application for SPDIF and
surround
+ C355 100u +
R261
22K
+
+10u
+
C323
100P
R262
22K
+ C343
10u
+
+ C356 100u +
R257 75
+ C348
10u
+
R282 47K
R258 75
C351
0.1u
C316
100P
C344 1u
+
C338
10u
+
L32 FERB
C317
100P
R283 22
JACK 2
LINE-IN/SURR-OUT (Port-C)
1
2
5
3
4
+
+100u
+
JACK 3
FRONT-OUT (Port-D)
1
2
5
3
4
R259 2.2K
C324
0.1u
R234 1k
R278 20 K ,1 %
L33 FERB
L25 FERB
R284
22
C350
0.1u
U38
ALC888
U38
Sense A 13
LINE2-L 14
LINE2-R 15
MIC2-L 16
MIC2-R 17
CD-L 18
CD-GND 19
CD-R 20
MIC1-L 21
MIC1-R 22
LINE1-L 23
LINE1-R 24 PIN37-VREFO 37
AVDD2 38
SURR-L 39
JDREF 40
SURR-R 41
AVSS2 42
CEN 43
LFE 44
SIDESURR-L 45
SIDESURR-R 46
SPDIFI/EAPD 47
SPDIFO 48
R260 2.2K
R235 1k
C339 1u
C352
0.1u
C345
22P
R286
22K
FB107 FERB
J38
CD-IN Header
1
2
3
4
C340 1u
C353
100P
L26 FERB
R263 75
R290 75
D42
1N4148
C315
0.1u
R236 1k C341 1u
C354
100P
R287
22K
+ C318 10u +
R264 75
R291 75
R279 20K,1%
B130LAW/1N5817
+ C319 10u + L27 FERB
R280 5.1K ,1%
C346
0.1u
JACK 1
MIC-IN/CEN&LFE OUT (Port-B)
1
2
5
3
4
+ C320 10u +
C322
100P
FERB
R255
22K
R281 10K,1%
+ C321 10u +
L28 FERB
7805/200mA
IN 1 OUT 3
+
C342 10u
+
R256
22K
R272
4.7k
C362
C363
FB10 6
D45
DNI