UART Connections!

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UART Connections!

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qammarabbas
Contributor IV

Hi,

I am using UART of T1042. The device i am communicating with does not have the "CTS" and "RTS" pins as in UART of T1042. What should i do with the "UARTn_CTS_B" and "UARTn_RTS_B" pins of T1042? 

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r8070z
NXP Employee
NXP Employee


Have a great day,

UARTn_RTS_B can be left unconnected. UARTn_CTS_ should be pulled up high through a2-10 kΩ resistor to DVDD (or else programmed as GPIO and output - see RCW[UART_BASE]).

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toddreed
Contributor I

Hi Serguei,

I see in AN4261 that the recommendation is to tie CTS high through a 2-10kΩ resistor to OVdd if CTS is not used.  We did not see this note and left UART_CTS0_B floating.  Is this an issue if we disable hardware flow control when turning on the port?  Is there any potential of damage, or is it just a floating input?

Thanks,

Todd

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