SAMD21 Sercom Serial with Half-Duplex

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I looked at the datasheet and the registers for the Sercom in serial mode.

on the second page, i find:

 

Up to six Serial Communication Interfaces (SERCOM), each configurable to operate as either:

• USART with full-duplex and single-wire half-duplex configuration

 

but i find no other references to achieving half duplex configuration or operation.

 

If i disable the transmitter, with CTRLB.TXEN, does the TX pin mode (normally output) change?

 

Looking for a nudge in the right direction.

Last Edited: Fri. Jun 8, 2018 - 07:53 PM
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Got you any feedback?

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Did you check the latest datasheet?

 

AFAICS, it hasn't changed.

 

You'll probably need to raise a support case with Microchip:

 

https://microchipsupport.force.com/s/

 

https://microchipsupport.force.com/s/article/How-to-submit-a-case

 

https://www.microchip.com/about-....

 

 

 

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Well, you can set the TX Pad and RX pad to the same pin...

I see the FIFOs are still mentioned but not documented as well... :-(  https://community.atmel.com/foru...