Seco COMe-C55-CT6 User Manual page 33

Com express type 6 module with the intel 8 th generation core and celeron 4000 cpus

Table of Contents

PCIE_TX7+/PCIE_TX7-: PCI Express lane #7, Transmitting Output Differential pair

PCIE_RX7+/PCIE_RX7-: PCI Express lane #7, Receiving Input Differential pair

PCIE_CLK_REF+/ PCIE_CLK_REF-: PCI Express 100MHz Reference Clock, Differential Pair. Please consider that only one reference clock is supplied, while there

are eight different PCI express lanes and one PEG. When more than one PCI Express lane is used on the carrier board, then a zero-delay buffer must be used to

replicate the reference clock to all the devices.

3.2.5.5

PEG interface signals

In addition to the eight PCI express lanes, described in the previous paragraph, the COMe-C55-CT6 module can offer a PCI-Express x2 or x4 graphics interface

(PEG), which can be used for connection of external graphics cards. Such an interface is directly managed by the SoC's embedded PCH.

Here following the signals involved in PEG management.

PEG_TX[0..3]+/PEG_TX[0..3]-: PCI Express Graphics lane #0 ÷ #3, Transmitting Output Differential pairs.

PEG_RX[0..3]+/PEG_RX[0..3]-: PCI Express Graphics lane #0 ÷ #3, Receiving Output Differential pairs.

PEG_LANE_RV#: PCI Express Graphics lane reversal input strap, electrical level +3.3V_RUN with a 10kΩ pull-up resistor. This signal must be driven low, on the

carrier board, only in case it is necessary to reverse the lane order of PEG interface. It must be left unconnected if lane reversal is not necessary.

3.2.5.6

USB interface signals

Inside the SoC's PCH, the Flexible High Speed I/O (HSIO) is able to manage up to four Superspeed ports (i.e. USB 3.1 compliant) and up to ten USB 1.x / 2.0 Host

ports. Via BIOS settings it is possible to enable or disable the xHCI controller, therefore enabling USB 3.0 functionalities or leaving only USB 1.1 and USB 2.0 support.

All USB 2.0 ports are able to work in High Speed (HS), Full Speed (FS) and Low Speed (LS).

Here following the signals related to USB interfaces.

USB_0+/USB_0-: Universal Serial Bus Port #0 bidirectional differential pair.

USB_1+/USB_1-: Universal Serial Bus Port #1 bidirectional differential pair.

USB_2+/USB_2-: Universal Serial Bus Port #2 bidirectional differential pair.

USB_3+/USB_3-: Universal Serial Bus Port #3 bidirectional differential pair.

USB_4+/USB_4-: Universal Serial Bus Port #4 bidirectional differential pair.

USB_5+/USB_5-: Universal Serial Bus Port #5 bidirectional differential pair.

USB_6+/USB_6-: Universal Serial Bus Port #6 bidirectional differential pair.

USB_7+/USB_7-: Universal Serial Bus Port #7 bidirectional differential pair.

USB_SSRX0+/USB_SSRX0-: USB Super Speed Port #0 receive differential pair

COMe-C55-CT6