MPC5775E-EVA eTPU DIfferential UART

[bchang32]

I am looking at the MPC5775E-EVA board. I am trying to figure out if it can handle RS485 UARTs. I see from the function selector that eTPUs can handle UARTs, but I'm not sure if it can handle differential signaling. From looking at the datasheet, it looks like DSPI and MSC can handle differentials (I'm not sure where MSCs are on the board if there are any).

Can eTPU handle differential signals (mainly RS485)?

[johndiener]

eTPU pins cannot handle differential signals directly - external hardware/transceiver would be needed. ASH WARE has produced a version of the eTPU UART function that is more RS-485 capable - e.g. it has driver/transmit enable output capability - see https://github.com/jddiener/UART-eTPU. If there is interest this UART version could be added to the ASH WARE eTPU Code Builder at http://ashware.ddns.net/CodeBuilder/eTPU_code_builder.aspx.