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AV/HDMI CIRCUIT DIAGRAM
*IMPEDANCE MATCH ING IS REQUIRED : 100 OHM ( AT EACH DIFFERENTIAL LINE)
*Ethernet Design & Layout Guide*
1.Eth Data DP/DN must be routed as 100ohm differential pairs.
2.Match Trace length of DP/DN
3.Trace spacing is same as trace width.
4.Route differential pairs above gnd plane and gnd plane are not split under differential pairs.
5.Avoid via aspossible as you can.
6.Trace spacing between DP/DN and other trances must be more than 5 times of DP/DN trace width.
7. EPHY_RDAC resistor(R102) must be place close to BCM7440.
ETHERNET
Jk901(RD1-105BAG1A)
involved transmitter filter & Receiver filterEthernet Jack Module
LAN_TX+
LAN_TX-
JK901
R901
R902
49.9(1%)
49.9(1%)
1
TD+
2
TD-
3
TCT
C901
0.1uF
4
NC
5
NC
6
NC
GND
PWFEOUT
7
RD+
R905
C902
8
RD-
0
0.1uF
9
GND
GND
10
GND
LAN_RX+
LAN_RX-
R903
R904
49.9(1%)
49.9(1%)
GND
C903
0.1uF
GND
0.1uF
C910
1
CVBS_I
IN_CH1
2:C3
2
IN_CH2
3
IN_CH3
4
R954
VS+
150_1%
GND
GND
5.3VA
Q902
2SA1037K
A_MUTE
R936
D905
DAP202K
1K
R937
GND
1K
R970
Q903 KRA103S
1K
3.3V
Q904
KRA103S
IC903
PCM1780
R969
1K
GND
1
16
5V
ZEROL/NA
ZEROR/ZEROA
2
15
MS
VOUTL
ML
3
14
L905
MC
VOUTR
SCL_MC
HB
CA905
4
13
10uF/16V
MD
VCOM
SDA_MD
5
12
SCK
AGND
A_MCLK
R933
22
6
11
DATA
VCC
A_DATA4
7
10
BCK
NC
A_BCK
C920
8
9
LRCK
NC
0.1uF
A_LRCK
GND
TOP VIEW
H_SCL
2
4
6
1
3
5
7
H_SDA
9
C911
0.1uF
GND
IC901
THS7314
75_1% K4
8
R913
OUT_CH1
CVBS
PR
7
OUT_CH2
PB
6
OUT_CH3
Y
5
GND
R915
R914
R916
150_1%
150_1%
150_1%
GND
Termination Resistor are placed close to Video Filter
GND
GND
GND
Q905
KTC3875S
Q906
KTC3875S
R939
12K
CA909
220uF/16V
R938
R940
R941
GND
GND
5.1K
C922
330
8.2.K
R955
100pF
C923
8.2.K
680pF
C921
12V_AUDIO
680pF
GND
GND
GND
R942
IC904
5.6K
R944
1K
NJM4580M
R943
CA911
12V_AUDIO
220uF/16V
4.7K
R947
10
R945
CA912
GND
C924
5.1K
220uF/16V
100pF
GND
R946
R948
C925
C926
680pF
12K
330
680uF
GND
GND
At each differential pair
trace impedance must be
100 ohm.
*HDMI Design & Layout Guide*
1.HDMI differential pair signals must be routed as 100ohm differential pairs.
2.Match Trace length of
differential pairs.
3.Trace spacing is same as trace width within pair signals.
4.Route differential pairs above gnd plane and gnd plane are not split under differential pairs.
5.Avoid via aspossible as you can.
6.Trace spacing between DP/DN and other trances must be more than 5 times of DP/DN trace width.
7. Trace Length must be less than 100mm.
HDMI Level Shifter
3.3V
5V
0.1uF
C937
R908
R909
R907
R910
Q907
GND
10K
2SK3018
2K
2K
10K
HDMI_SCL
HDMI_SDA
Q908
V902
2SK3018
V901
N.C
N.C
GND
Place R908,R909 and C686 on the top of PCB
Maximum capacitance of DDC line is 50pF.
Maximum CEC line leakage current in off (unpowered) state : 1.8uA
3.3V
L906
HB2012_1000
CA913
C935
100UF/6.3V
0.1uF
R919
R921
R922
NC(3M)
3M
3M
GND
IC902
THS7316
0.1uF
8
75_1%
C913
1
IN_CH1
R923
OUT_CH1
C914
0.1uF
7
75_1%
2
IN_CH2
R924
OUT_CH2
0.1uF
75_1%
C915
3
6
R925
IN_CH3
OUT_CH3
4
5
VS+
GND
GND
220
R950
AUDIO_R
K4
220
R949
AUDIO_L
R952
R951
100K
100K
CA910
GND
220uF/16V
R976
75_1%
TP908
R975
75_1%
TP909
R974
75_1%
TP910
10K
R963
D2_CTL3
10K
TP911
R964
D2_CTL2
10K
TP912
R965
D2_CTL1
TP913
GND
2-10
HPD
C907
2.2uF(N.C)
5V
D901
N.C
R900
0
HDMI_CEC
L902
HB2012_1000
HDMI_SDA
C934
0.1uF
HDMI_SCL
GND
TXC-
TXC+
TX0-
TX0+
4.7*4N
RN901
TX1-
TX1+
TX2-
TX2+
4.7*4N
RN902
OPTICAL/COAXIAL
R926
TP907
have to change component symbol
ASPDIF
100
C916
27pF
GND
COMP_PR
COMP_PB
GND
COMP_Y
C917
R928
R929
0.1uF
100
75
C918
C919
100pF
100pF
*Audio & Video Singnal Layout Guide*
1. Component & CVBS signal traces must be routed using signal to signal spacing is more than 0.25mm.
2. Place R101,R107,VDAC_BIAS resistors close
to 7440
3. Audio ciock signals are might be needed damping resistors
-SCK,BCK,LRCK
COMPONENT, CVBS , 2CH AUDIO
COMP_Y
CVBS
12
GND
COMP_PB
11
GND
10
AUDIO_L
COMP_Pr
9
GND
8
COMP_Pb
COMP_PR
7
GND
6
AUDIO_R
COMP_Y
5
GND
4
GND
3
D2_CTL3
2
D2_CTL2
1
D2_CTL1
have to change component symbol
CN907
HDMI
GND
19
HPD
VCC +5V
18
GND
17
GND
SDA
16
15
SCL
14
NC
13
CEC
12
TX-CLK
11
TX-SHD
10
TX-CLK+
9
TXO
8
TXO_SHD
7
TX0+
6
TX1
5
TX1_SHD
4
TX1+
3
TX2
2
TX2_SHD
1
TX2+
JK902
GND
5V
OUT
R927
22
CA914
10uF/16V
C936
D904
0.1uF
NC
3
2
1
GND
B
A
JK903
R962
110
GND
and damping resistors
are placed close to 7440
9
8
7
6
5
4
3
2
1
D906
NC
JK904
GND
GND
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