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RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom.; Onboard 3PIN SWD port for connecting the debugged target board. Standard CMSIS-DAP interface can be used to debug most ARM-based microcontrollers, Works with OpenOCD and other tools supporting CMSIS-DAP, Adopts the Raspberry Pi 3PIN Debug Connector Specification; Onboard 3PIN USB to UART bridge, onboard 4PIN I2C port for the testing target board.; Onboard 1.14 inch 240×135 pixels 65K color IPS LCD display; Equipped with plastic case and cables, Open-source firmware, more convenient to upgrade