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TMS570LS0432: UART resistors

Kartik Shanbhag18
Intellectual 600 points
Part Number: TMS570LS0432

Hello.

I am building a custom board for TMS570LS0432 micro-controller. I had a doubt regarding the SCI_TX and SCI_RX pins. Is it necessary to connect resistors in series with these pins? The LaunchPad Schematics do not have any resistors but the Hardware development kit schematics do.

This is from the HDK schematics:

This is from the Launch Pad schematics:-

Thank you.