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configure UART from H4 (4-wire) to H5 (3-wire)

Satyajit Ketkar
Prodigy 230 points
Other Parts Discussed in Thread: CC2564

Hello,

I have a board based on the MSP-EXP430F5438 and cc256xQFN-EM.  The current PCB layout has the MSP GPIO configured for 4-wire with the RTS(msp)-->CTS(cc) and CTS(cc)-->RTS(msp) just like the development kits mentioned above.  But now, I wish to reconfigure this to H5 (3-wire) where the RTS and CTs lines are not used and do it through firmware without having to change the PCB itself.  What is the recommended configuration for the two GPIO on the MSP?  Do I need to configure the cc2564B as well?  Can I just reconfigure GPIO pins as not used (drive pins output low?) or will this affect the cc2564b.  Is the cc2564 by default expecting H4 (4-wire)? Do i need to change it's configuration to H5 (3-wire)?

Thank you,

Satyajit Ketkar