Schematics

 

LithneConnectors Advanced

Download Pinout Simple or Pinout Advanced (Above) when printed without scaling it will fit the Lithne 1:1!

The co-processor is an ATXmega32A4U. This is an 8-bit, 32MHz processor with 32Kbytes of flash memory and 4Kbytes SRAM and 1024 bytes of EEPROM. It has 5 UART lines (serial lines) and it operates at 3v3. Click here for the datasheet

The main processor is an ATXmega256A3U. This is an 8-bit, 32MHz processor with 256Kbytes of flash memory and 16Kbytes SRAM and 4096 bytes of EEPROM. It has 7 UART lines (serial lines), 16 ADC channels with a 12-bit resolution, 22 PWM channels with 12 bit resolution. it operates at 3v3. Click here for the datasheet


Summary

Main-Processor
ATxmega256A3U-AU
Co-Processor
ATxmega32A4U-AU
Operating Voltage
3V3
Input Voltage (recommended)
7-24V
Input Voltage (limits)
7-36V
DC Current per I/O Pin
25 mA
DC Current for 5V Pin
1500mA
Digital I/O Pins
20 (of which 16 provide PWM output)
Analog Input Pins
16
DC Current for 3.3V Pin
500mA
Flash Memory
256 KB + 8 KB for bootloader
Internal SRAM
16 KB
EEPROM
4 KB
I/O Registers
4 KB
Clock Speed
32 MHz

 

Pinout Simple or Pinout Advanced

Power

The Lithne can be powered via USB, an external power supply or through a battery connected to the Power Shield. The Lithne switches automatically between power sources.

The USB connector is a type B female connector, an AC-DC adapter can be connected to the 2.1mm center-possitive plug (equal to that of an Arduino) and the battery that can be connected to the Power Shield is an iPod battery.

The Lithne features the following power pins:

  • Vin_F. When the Lithne is powered through an external power supply this pin enables you to supply voltage through. You can also supply the board through this pin. This pin is only functional when a power source is connected to it.
  • USB_VBUS. When the Lithne is powered via USB this pin enables you to supply voltage through. This pin is protected by a diode, but it does not feature a fuse. Therefore it is not advisable to supply voltage through other means than a protected USB power supply or computer.
  • Vin_5V. When the Lithne is power through an external power supply connected to the power plug or Vin_F this pin will give you access to the regulated 5V. The maximum current that can be drawn from this pin is 1.5A. This pin is not usable when powering the board via USB or through the Power Shield. This pin is unprotected as it is an output pin only, supplying current through this pin will damage the board! 
  •  V+RAW. Derived from Vin_5V and/or USB_VBUS, combines these voltages and adds extra protection before supplying voltage to the 3V3 voltage regulator.
  •   +3V3. Supply for the Lithne’s processors and external components. The maximum current that can be drawn from this pin is 500mA.  This pin is unprotected, supplying current through this pin will damage the board!
  •  GND. Ground.

Communication

Serial Ports (Main Processor)

Serial: Secondary connection to CoProcessor
Serial1: Primary connection to CoProcessor
Serial6: FTDI Connector (underneath XBee)

Packets send to Serial1 (CoProcessor) will automatically be forwarded to the XBee. So if you wish to use XBee, use Serial1.

Serial Ports (Co Processor)

Serial: Secondary connection to MainProcessor
Serial1: XBee Connection
Serial2: Aux Port - pin 4-5 (respectively tx/rx) on J1
Serial3: USB Port
Serial4: Primary connection to MainProcessor

Packets incoming on the XBee will automatically be forwarded to the main processor which will receive it on Serial1.