That’s the only compromise made for the small size. XIAO-RP2040 only breaks out 11 pins from the RP2040 microcontroller, which actually has 30 GPIOs. If you want to solder power supply wires directly, there are breakout pins and two pads for that on the back of the board.
The USB is used to powering the board and programming the MCU. All XIAO boards sport USB Type-C ports for connection versatility, which is a highly welcomed feature. The castellated PCB can also be soldered directly onto another PCB. Means once you solder all the header pins, you can directly plug the module onto a breadboard easily. XIAO-RP2040 design is breadboard friendly. FCC certified: Yes, with metal shielding cover.Software compatibility: Supports C/C++, Micropython, Arduino and CircuitPython.Power Pads: For the battery power supply.
SEEED LINK IT ONE V1.0 SERIAL
CPU: RP2040 Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz.Broad compatibility: Pins compatible with Seeeduino XIAO and supports Seeeduino XIAO’s Expansion board.Multiple interfaces: 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface.Small size: As small as a thumb (20 x 17.5mm) for wearable devices and small projects.Easy project operation: Breadboard-friendly & SMD design, no components on the back.Flexible compatibility: Supports C/C++, Micropython, Arduino and CircuitPython.
Rich on-chip resources: 264KB of SRAM, and 2MB of onboard Flash memory.Powerful RP2040 MCU: Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz.Visit Seeed Store Features of XIAO RP2040
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