Features:

• RP2040 microcontroller with 2MB of flash memory
  
• On-board single-band 2.4GHz wireless interfaces (802.11n)
• Micro USB B port for power and data (and for reprogramming the flash)
• 40 pin 21mmx51mm ‘DIP’ style 1mm thick PCB with 0.1″ through-hole pins also with edge castellations
• Exposes 26 multi-function 3.3V general purpose I/O (GPIO)
• 23 GPIO are digital-only, with three also being ADC capable
• Can be surface mounted as a module
• 3-pin ARM serial wire debug (SWD) port
• Simple yet highly flexible power supply architecture
• Various options for easily powering the unit from micro USB, external supplies or batteries
• High quality, low cost, high availability
• Comprehensive SDK, software examples and documentation

For full details of the RP2040 microcontroller please see the RP2040 Datasheet book. Key features include:

• Dual-core cortex M0+ at up to 133MHz
  
• On-chip PLL allows variable core frequency
• 264kByte multi-bank high performance SRAM
• External Quad-SPI Flash with eXecute In Place (XIP) and 16kByte on-chip cache
• High performance full-crossbar bus fabric
• On-board USB1.1 (device or host)
• 30 multi-function general purpose I/O (four can be used for ADC)
• 1.8-3.3V I/O voltage
• 12-bit 500ksps analogue to digital converter (ADC)
• Various digital peripherals
• 2 × UART, 2 × I2C, 2 × SPI, 16 × PWM channels
• 1 × timer with 4 alarms, 1 × real time clock
• 2 × programmable I/O (PIO) blocks, 8 state machines in total
• Flexible, user-programmable high-speed I/O
• Can emulate interfaces such as SD card and VGA