UNDER CONSTRUCTION - LIABLE TO CHANGE
UX2 is an open source, connector-agnostic, board-to-board communication bus. It supports multiple interface protocols, facilitating connection to a vast range of commerically available add-on modules from popular venodors.
There are four variants which determine the function of the outer pins...
UX2-GPIO – four GPIO
UX2-ALT – two GPIO, one addtional I2C
UX2-1IS – 1-Wire, Interrupt and Sound-Wire
Note: Not suitable for hosts that rely on energy harvesting
UX2-I2C – two additional I2C
See also: Tips on pin variant selection
| UX2 | Protocol |
|---|---|
 |
GPIO |
 |
1-WIRE |
 |
INTERRUPT |
  |
POWER |
  |
UART / Asynch |
  |
I2C / SMBus |
    |
SPI |
  |
SOUND-WIRE |
- GPIO – General Purpose Input/Output
- Interrupt – wake master/host MCU via slave/module triggered interrupt
- UART / Async - serial communication bus
- Sound-Wire
UX2 is compatible with hundreds of commercially available and open source modules. For more information, see Modules.
UX2-1IS pin variant, with following wiring:
SWDconnects toDataSWCconnects toClockorClk
Note: In circuit schematics, the clock connections are often omitted for sake of clarity (focus is on the data); the clock connection is always required regardless.
Use the UEXT bus (see UEXT section above) in conjunction with Olimex Interface Modules.
Any pin variant can be used as they don't affect the UEXT pins.
See License.