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# USB-A and USB-AF/USB-C ports cannot be used at the same time. The USB-AF and USB-C power supply ports can be used at the same time.
==Features==
* 1 x Full-size HDMI 2.0 Interface
* PCB Dimension: 70x45mm
==User Manual==
=== Hoow to use CM4 stick flashing OS into TF card==* Install [https://github.com/raspberrypi/usbboot/raw/master/win32/rpiboot_setup.exe Rpi-boot Windows installer], download then double click it to setup. After the installation is complete, you can get a shortcut to '''rpiboot'''* Move the 'TOGGLE SWITCH' of CM4 stick to A direction, then insert your desktop computer, then run '''rpiboot''', You can find that the computer will add a logical drive letter. 此处需要插入一张图片* Now, you use CM4 STICK as a normal USB device to burn firmware to it. ===How to use CM4 stick to start CM4 ==1. Firstly, don’t forget to move the toggle switch to the B direction. 此处需要插入一张图片2. Insert TF card 3. The USB interface is disabled to save power by default on the CM4 . To enable it you need to add dtoverlay=dwc2,dr_mode=host to the config.txt file, detail to refer to [https://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf CM4 datasheet] dtoverlay=dwc2,dr_mode=host More reaspberry pi official documentation refer to [https://github.com/raspberrypi/documentationOfficial Documentation]
[https://github.com/raspberrypi/usbboot/raw/master/win32/rpiboot_setup.exe Rpi-boot Windows installer] or refer to [https://github.com/raspberrypi/documentation/blob/master/hardware/computemodule/cm-emmc-flashing.md CM4 emmc flashing]
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