– RP2040 microcontroller with 2MByte Flash
   – Dual-core cortex M0+ at up to 133MHz
   – 264kByte multi-bank high performance SRAM
   – External Quad-SPI Flash with eXecute In Place (XIP)
   – High performance full-crossbar bus fabric
   – 30 multi-function General Purpose IO (4 can be used for ADC)
     – 1.8-3.3V IO Voltage (NOTE. Pico IO voltage is fixed at 3.3V)
   – 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 Counter
   – 2 × Programmable IO (PIO) blocks, 8 state machines total
   – Flexible, user-programmable high-speed IO
   – Can emulate interfaces such as SD Card and VGA
 – Includes W5100S
   – Supports Hardwired Internet Protocols: TCP, UDP, WOL over UDP, ICMP, IGMPv1/v2, IPv4, ARP, PPPoE
   – Supports 4 Independent Hardware SOCKETs simultaneously
   – Internal 16 Kbytes Memory for TX/ RX Buffers
   – SPI Interface
 – Micro-USB B port for power and data (and for reprogramming the Flash)
 – 40 pin 21×51 ‘DIP’ style 1mm thick PCB with 0.1″ through-hole pins also with edge castellations
 – 3-pin ARM Serial Wire Debug (SWD) port
 – 10 / 100 Ethernet PHY embedded
 – Supports Auto Negotiation
   – Full / Half Duplex
   – 10 / 100 Based
 – Built-in RJ45(RB1-125BAG1A)
 – Built-in LDO (LM8805SF5-33V)