The RP2040 microprocessor (MCU) integrates a dual-core ARM architecture Cotex-MO+ core, directly integrates 264KB of RAM internally, supports up to 16M QSPI external expansion Flash, and highly flexible I/O settings, including I2C, SPI, PIO (Programmable I/O). Dual-core ARM Cortex-M0+@ 133MHz, 264kB built-in SRAM distributed in 6 independent blocks, Max external QSPI Flash expansion, directly connected to the AHB bus, equipped Complete interpolator and integer divider, on-chip programmable LDO to generate core voltage, 2 on-chip PLL phase-locked loops for USB and core clock generation, 30 GPIO pins, 4 of which can be used as analog inputs. Peripherals : 2 serial ports/2 SPI/2 I2C/16PWM channels/USB 1.1 controller and PHY, supports host mode and slave mode/8 PIO state machine. Regarding the YD-RP2040 core board, YD-RP2040 is a core board circuit board produced by VCC-GND® Studio using the RP2040 microprocessor (MCU) issued by the British for Raspberry Pi Company. It is convenient for users to expand peripherals and design and build circuits. Light-emitting diode description: Power indicator light, red light, used to indicate power on status, USR LED, GPIO25, blue light, used for user programming control, RGB LED WS2812B, GPIO23, used for user programming control Key description: USR KEY, GPIO24, used for user programming input control BOOT KEY, used for boot download RST KEY: used to reset the system, or enter boot download mode with BOOT KEY Description: About the advantages of using RP2040 chip for Raspberry Pi, with its extremely cost-effective for Raspberry Pi computer board, has become one of the leading computer data manufacturers. Cost-effectiveness has always been the label of Raspberry Pi. It can simply be considered an unfamiliar controller. The performance index is high enough and the necessary peripherals are also available. In theory, the target design can eventually be achieved. Function: The PWR power indicator light has been added to improve the hum