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LPC11C14 CAN and UART Pins

Question asked by Satbir Sekhon on Aug 24, 2017
Latest reply on Aug 27, 2017 by jeremyzhou

Hello All,

 

Currently, on LPC11C14, I have the CAN TXD/RXD pins connected to the corresponding UART TXD/RXD pins, and have been using the UART without any issues. The idea was to be able use either the UART or CAN controller. 

 

The datasheet says that the default state of the CAN TXD pin is HIGH, so how is my UART working?  

Won't there be a short when the UART TX pin pulls the line down? 

 

Would this setup be an issue if I had to program the chip in ISP mode ?

 

Thanks,

Satbir

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