BLIKVM PCIe

You will need the following things

• Raspberry Pi CM4(if you order PCIe card only).
• PoE-sourcing equipment or 5V/3A USB adapter.
• CR1220 coin cell battery.

hardware feature list

HDMI IN

The bridge chip is Toshiba TC358743, which supports both video and audio(I2S), and the highest input resolution is 1080p@60fps. Fixed HDMI back power issue.

USB-PC

The BLIKVM PCIe card provides two USB interfaces, one is PC-IN (type c interface) and the other is USB-PC2 (pin interface). The purpose of these two interfaces is to connect to the USB of the controlled computer, used to control the mouse and keyboard. At the same time, only one interface can be used. The purpose of designing two interfaces is to directly use USB PC2 when the user's PC host has a row pin USB interface, which will make the wiring more concise.

POWER-IN

When using PoE power supply, there is no need to connect the PWR-IN port. When not using PoE power supply, connect the PWR-IN port to a standard 5V/3A USB power supply.

ETHERNET-PoE

• Gigabit Ethernet port
• Standard: IEEE 802.3af PoE
• Input voltage: 37-57 V DC
• Output power: 5 V DC/2.4 A

ATX-Connecter

• Connect to power control interface on the motherboard of the controlled computer with DuPont cables. It can turn on, off, and restart the controlled computer.
• The pin is defined on the printing of the PCIe board, BTN means button.
• According to the instructions of the computer motherboard, first find the position of the ATX function related pins on the motherboard, and then unplug the ATX ray that has been connected to the motherboard. After unplugging, the power button of the computer will lose its function. There are two rows of 8PIN pins on the PCIe board. It is unnecessary to distinguish between the two rows of pins when they are used with the same functions. One row of pins is used for KVM to control ATX-related functions, and the other row of pins is connected to the ATX DuPont head unplugged from the main board to maintain the original chassis power button function. Connect each wire according to the specific pin definitions on the motherboard and PCIe. See the following figure for the connection relationship：
  

OLED Display

A white OLED display with a resolution of 128x64, and the chip is SSD1306. This display can show the temperature, IP address and other information of the Raspberry Pi.

FAN

The Card HAT is fitted with a small fan that is controlled by your Raspberry Pi CM4 via GPIO12.

BOOT

Fit jumper to disable eMMC Boot

Real Time Clock (RTC)

The clock chip is PCF8563 that is controlled by your Raspberry Pi CM4 via I2C. The CR1220 battery is installed under the HDMI IN module.

UART

Connect the serial port to debug your Raspberry Pi CM4.
The uart of Raspberry Pi CM4. G for GND, T(GPIO 14) for TXD, R(GPIO 15) for RXD.
Connect serial cable wires to G T R connectors on the PCIe board. NOTE: black wire = Ground, whiTe = Tx, and gReen = Rx; For specific methods, please refer to this document.

HDMI pass-through EDID emulator

If the controlled computer does not output HDMI images correctly, please use this accessory. Connect the Source port to the controlled computer, connect the Sink port to the HAT. Then you can set the correct HDMI output on the controlled computer.

VGA-HDMI module

When your device does not have an HDMI output interface, you can use a VGA to HDMI module.

USB to TTL module

Connect your computer usb interface with the serial port of BLIKVM to debug your Raspberry Pi CM4.

Fan

Use a cooling fan to cool the Raspberry Pi CM4, but installing a fan will make the product thicker than a standard PCIe add-in card.