The Multibus base Daughter board, depicted in picture below, is meant to be used with the FLEX Base Boards.

Check technical details (PDF) 

The Multibus board simplifies the work with the communication peripherals integrated in the Microchip dsPIC (R) DSC. The board, which is fully modular, provides a set of modules that realize the hardware interface with the buses. The Multibus Base Daughter Board is piggybacked on FLEX Full/Light Base Board.

The following slots are available on the Multibus board:

•  UART2 slot, for Serial TTL/RS232/RS485/RS422 module
•  UART1 slot, for Serial TTL/RS232/RS485 module
•  CAN1 slot, for CAN module
•  CAN2 slot, for CAN module
•  I2C slot (channel selectable), for I2C module
•  SPI slot (channel selectable), for SPI module
•  Ethernet slot, for 10Mbit Ethernet module

Modules are mounted only if needed. For example, if the application requires the Ethernet interface and the connection to the CAN bus, only the corresponding modules will be mounted on the Multibus board, leaving the remaining pins free for other use.

Note: The RJ45 Ethernet connector is not included in the product FLEX101. It comes with product FLEX102.

For more information about the Multibus board, please read the FLEX reference manual available in the Documentation page .