The new flexible $4 microcontroller board from Raspberry Pi - plus wireless

• Debug Interfaces
  JTAG/SW	3-pin SWD I/F

• Connectors
  USB	1 x USB 1.1 with device and host support
  SPI	2 x SPI
  I2C	2 x I2C
  Other Connector Type	2 x UART
  Other Connector Type	3 x 12-bit ADC
  Other Connector Type	16 x PWM Channels
  Other Connector Type	8 x Programmable I/O (PIO) state machines for custom peripheral support

• I/O
  Digital I/Os	26 x 26 × multi-function GPIO pins

• Sensors
  Temperature Sensor	1 x Temperature Sensor