Seco COMe-C55-CT6 User Manual page 38

LPC_DRQ[0÷1]#: LPC Serial DMA Request, +3.3V_RUN electrical level. These signals only have a 100kΩ pull-up resistor on module, internally they are not used
by the chipset nor by the Embedded Controller.
eSPI_EN#: this input signal should be used by the carrier board to request eSPI interface configuration, which is, however, not supported by the module. Therefore,
driving low this signal would have no effect. Electrical level +3.3V_RUN with 100kΩ pull-up resistor.
3.2.5.10 SPI interface signals
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The Intel 8 generation Core or Celeron 4000 series processors offer also one dedicated controller for Serial Peripheral Interface (SPI), which can be used for
connection of Serial Flash devices. Please be aware that this interface can be used exclusively to support platform firmware (BIOS).
Signals involved with SPI management are the following:
SPI_CS#: SPI Chip select, active low output signal, +3.3V_ALW electrical level with 10kΩ pull-up resistor.
SPI_MISO: SPI Master In Slave Out, Input to COM Express
SPI_MOSI: SPI Master Out Slave In, Output from COM Express
up resistor
SPI_CLK: SPI Clock Output to carrier board
SPI_POWER: +3.3V_ALW Power Supply Output for carrier board
BIOS_DIS[0÷1]#: BIOS Disable strap signals. These two signals are inputs of the COM Express
in order to select which SPI Flash device has to be used for module
meaning of possible configurations of these two signals.
3.2.5.11 Analog VGA interface
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The Intel 8 generation Core or Celeron 4000 series processors do not offer any analog display interface, which could be used for the connection of older
VGA/CRT displays.
As a factory option, however, it is possible to purchase COMe-C55-CT6 modules equipped with a DP to VGA bridge (NXP PTN3356BS), which allow the
implementation of a VGA interface with a maximum supported resolution of 2048x1536 @ 50Hz (reduced blanking).
Signals dedicated to VGA interface are the following:
Please remember that the VGA interface is not native for the Intel
optional DP-to-VGA bridge which will require the use of DDI port #2.
Please take care of specifying if VGA interface is needed, before placing an order of COMe-C55-CT6 module.
VGA_RED: Red Signal video output. A 150Ω pull-down resistor is placed on the line.
COMe-C55-CT6
COMe-C55-CT6 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by L.V. Copyright © 2020 SECO S.p.A.
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module from SPI devices embedded on the Carrier Board. Electrical level +3.3V_ALW.
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module to SPI devices embedded on the Carrier Board. Electrical level +3.3V_ALW with 3k2Ω pull-
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s SPI embedded devices. Electrical level +3.3V_ALW. Supported clock frequencies are 20, 33 and 50 MHz.
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s SPI devices.
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s boot. Please refer to table 4.13 of COM Express
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Module, that on the carrier board can be left floating or pulled down
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8 generation Core or Celeron 4000 series processors, it is derived from an
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Module Base Specifications rel. 3.0 for the
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