Using for 's official self-designed RP2040 microcontroller chip Equipped with dual-core ARM M0 + processor, operating frequency up to 133MHz flexible clock Built-in 264KB of and 4MB of on-chip Flash Using Type-C interface, keeping up with the trend of , no need to entangle the positive and negative plug Onboard lithium battery charge and discharge interface, which is conducive to the use of this product in some mobile scenarios Onboard DC-DC chip TPS63000, 1.8A current switching high-efficiency DC-DC buck-boost chip Stamp hole design, can be directly welded and integrated into the base plate designed by the user USB1.1 host and device support Support low-power sleep and hibernation modes Can be identified as mass storage via USB for drag-and-drop download of programs Up to 26 multi-function GPIO pins 2 SPI, 2 I2C, 2 UART, 3 12-bit ADC, 16 controllable PWM channels Precise on-chip clock and Temperature Sensor On-chip accelerated floating point library 8 programmable I/O (PIO) state machines for custom peripheral support Type: No Welded Colour: Blue Material: PCB Package Contents: 1 x Expansion Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.