Using for 's official self-designed RP2040 microcontroller chip Equipped with dual-core ARM M0 + processor, running frequency up to 133MHz flexible clock Built-in 264KB of SRAM and 2MB of on-chip Flash The real stamp hole design can be directly welded and integrated into the base plate designed by the user USB1.1 host and device support 1. Support low-power sleep and hibernation mode 2. Can be identified as mass storage via USB for drag-and-drop download of programs 3. 29 GPIO pins of RP2040 are led out (20 pins can be led out through headers, the rest can only be led out by welding) 4. 2 SPI, 2 I2C, 2 UART, 4 12-bit ADC, 16 controllable PWM channels 5. Precise on-chip clock and timer 6. Temperature sensor 7. 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.