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→How to clear SPIFlash using RKDevTool
<li><p>Then download the Rockchip driver '''DriverAssitant_v5.12.zi''' and '''MiniLoade''' and the burning tool '''RKDevTool_Release_v3.15.zip''' from the [http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/service-and-support/Orange-Pi-CM4-1.html '''Orange Pi data download page''']</p>
<ol style="list-style-type: lower-alpha;">
<li><p>On the [http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/service-and-support/Orange-Pi-CM4-1.html '''Orange Pi data download > page'''], > first select the official tool, and then enter the folder > below</p>
<div class="figure">
<li><p>Click the "'''Driver Installation'''" button</p>
<p>[[File:cm4-img34.png]]</p></li>
<li><p>After waiting for a period of time, a pop-up window will prompt > "'''Driver installed successfully'''", and then click the > "'''OK'''" button.</p>
<p>[[File:cm4-img35.png]]</p></li></ol>
</li>
<li><p>Then you can start to clear the contents of the SPI FLASH</p>
<ol style="list-style-type: lower-alpha;">
<li><p>First, connect the development board to the Windows computer > through a USB2.0 male-to-male data cable. The location of the > USB2.0 programming port on the development board is as shown > in the figure below.</p>
<p>[[File:cm4-img38.png]]</p></li>
<li><p>Make sure that the development board is not inserted into the TF > card and not connected to the power supply</p></li><li><p>Then press and hold the MaskROM button on the development board. > The location of the MaskROM button on the development board is > as shown in the figure below:</p>
<p>[[File:cm4-img39.png]]</p></li>
<li><p>Then connect the development board to the power supply of the > Type-C interface, power it on, and then release the MaskROM > button.</p>
<p>[[File:cm4-img40.png]]</p></li>
<li><p>If the previous steps are successful, the development board will > enter the '''MASKROM''' mode at this time, and the interface of > the burning tool will prompt "'''found a MASKROM device'''"</p>
<p>[[File:cm4-img41.png]]</p></li>
<li><p>Then please select '''<span class="mark">advanced functions</span>'''</p>
