the development boards so customer can choose which feature he want to use.
UEXT (Universal-Extension-Connector) is board to bard connector which support 3 serial communication interface, such as I2C, SPI, RS232.
The combination of theese feature is supported by every decent microcontroller, this will enable broad choice to connect modules.
UEXT gives you freedom to choose module that you want to use.
!!! Notice
As UEXT have RS232 and the Rx and Tx signals should be crossed we can say that UEXT on the board is with HOST; UEXT on the module is with SLAVE/DEVICE layout.
---TBU---
### Pinout Table
Helios64 provides UEXT on header P2 which following the UEXT standard, containing UEXT, SPI, and I2C connector.
You can find the P2 header from the connector/interface list at [hardware overview](/helios64/hardware) page.