Driver rockusb4/11/2023 Power on the board and release the maskrom key(important) Press and hold the Maskrom key if your board is Plus version with soldered eMMC (1: Reset 2: Maskrom 3: Recovery) Plug the USB Male A to Male A cable to ROCK Pi 4 OTG port(the upper USB3 port), the other side to PC Insert removable eMMC module ( Skip this when there in one eMMC on board) Short-circuit SPI Nor Flash if there is one SPI Nor Flash on board. To boot ROCK Pi 4 into maskrom mode is simple: ![]() Please check this guide, Install rockchip flash tools, rkdeveloptool/RKDevTool, under Windows/Linux/MacOS PC.
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