COM Express® Carrier Board Design Guide
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The reference schematic provides a generic eDP interface. The eDP connector used in the
design is an example only. Other connectors can be used based on the design requirements.
JP5 selects 3.3 or 5V for the panel power. R336 ensures that panel power is disabled when the
Module is powering up and before the signal is actively driven. The panel control signals
eDP_BLKT_EN, eDP_BLKT_CTRL as well as eDP_HPD are 3.3V level signals. Pay attention
to your panel specifications for correct voltage levels and provide translation
2.9.3 Routing Considerations
The traces from JP5 and associated FETs to the eDP connector carry power to the panel. The
traces are routed with appropriate thickness to handle the current expected. eDP_TX and
eDP_AUX differential pairs are routed as high speed differential pairs. The panel control signals
are low speed.
Summary of Contents for ET976
Page 1: ...COM EXPRESS CARRIER BOARD DESIGN GUIDE Version 1 0 January 2022...
Page 11: ...COM Express Carrier Board Design Guide 5 Figure 3 PCI Express x4 Slot Example...
Page 12: ...6 COM Express Carrier Board Design Guide Figure 4 PCIe Mini Card Reference Circuitry...
Page 19: ...COM Express Carrier Board Design Guide 13 Figure 7 HDMI Example 1...
Page 20: ...14 COM Express Carrier Board Design Guide Figure 7 HDMI Example 2...
Page 21: ...COM Express Carrier Board Design Guide 15 Figure 8 DVI Example 1...
Page 22: ...16 COM Express Carrier Board Design Guide Figure 8 DVI Example 2...
Page 31: ...COM Express Carrier Board Design Guide 25 Figure 12 USB 3 0 Example 2...
Page 37: ...COM Express Carrier Board Design Guide 31 Figure 14 LVDS Reference Schematic 2...
Page 44: ...38 COM Express Carrier Board Design Guide Figure 16 VGA Reference Schematics 2...
Page 48: ...42 COM Express Carrier Board Design Guide Figure 18 HDA Example Schematic 2...
Page 52: ...46 COM Express Carrier Board Design Guide Figure 19 LPC Super I O Example 2...
Page 61: ...COM Express Carrier Board Design Guide 55 Figure 24 General Purpose Serial Port Example 2...
Page 70: ...64 COM Express Carrier Board Design Guide Figure 28 PWRBTN and SYS_RESET Circuitry...
Page 84: ...78 COM Express Carrier Board Design Guide Chapter 4 Carrier Board PCB Layout Guidelines...
