TB-FMCH-HDMI4K Hardware User Manual
27
Rev.2.04
Figure 11-1 HDMI HPD and CEC Connections
12. Consumer Electronics Control (CEC)
The HDMI sink and source CEC signals pass through two Texas Instruments TPD5S116 companion
chips. This provides voltage translation, ESD protection, and terminations. Two three-pin headers (J10
and J12) provide a bypass loopback for test purposes. Figure 11-1 shows how the CEC signals are
connected and how the extender FMC CEC signals are connected.
13. ESD Protection
All HDMI source and sink TMDS differential signals are protected with Texas Instruments
TPD1E05U06DPYT unidirectional ESD protection devices. They provide IEC 61000-4-2 level 4
J10
J11
J1
J12
J13
19
13
HPD
CEC
J2
19
13
HDMI Source
HDMI Sink
1
28
2
3
1
2
3
HPD SINK
HPD SRC
3
SN65DP159
E3
HPD CON
CEC CON A3
HPD SYS
CEC SYS
E1
A1
no connection
TPD5S116
LA20_N G22
2
2
3
3
1
1
HPD
CEC
J3 FMC Connector
for Main Board
SN74AVC1T45
LA19_N (EXT RX HPD)
LA19_P (EXT RX CEC)
H23
H22
LA30_N (EXT TX HPD)
LA30_P (EXT TX CEC)
H35
H34
LA31_N
LA31_P
G34
G33
LA20_N
LA20_P
G22
G21
J8 FMC
Connector for
Extender
Card
LA31_N
LA31_P
G34
G33
U49
E3
HPD CON
CEC CON A3
HPD SYS
CEC SYS
E1
A1
TPD5S116
U50
LA20_P G21
no connection
pulled high
1 2 3
1 2 3
1 2 3
1 2 3
Normal Operation
HPD Bypass
Loopback
J11
J13
1 2 3
1 2 3
1 2 3
1 2 3
Normal Operation
CEC Bypass
Loopback
J10
J12
HPD Jumper Settings
CEC Jumper Settings
