kinetis KM35 UART Transmission buffer control of RTS

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kinetis KM35 UART Transmission buffer control of RTS

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jun1
Contributor V

Thank you for all your guidance.

I am using KM35(MKM35Z512VLL7R)
I have a question about the RTS control during UART transmission.

As shown in the figure, the RTS that allows the transmit buffer, when observed on an oscilloscope
It appears to rise one bit before the data to be transmitted.
When transmission is completed, it also appears to fall one bit later.
My questions are the following two points.
(1) Does the time for this one bit change according to the baud rate?
(2) Is there any description of this specification? I looked in the reference manual but could not understand.

Thank you in advance.

 

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Pavel_Hernandez
NXP TechSupport
NXP TechSupport

Hello,

In order to have in the same channel, Do you read the chapter 45.5.1.7 Transceiver driver enable, from the RM and do not understand?

I review the RM and in the UARTx_MODEM[RXRTSE] the assertion is controlled by this, and this will change depending on the baud rate.

Best regards,
Pavel

 

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jun1
Contributor V

Thank you very much. I understand.

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Pavel_Hernandez
NXP TechSupport
NXP TechSupport

Hello,

In order to have in the same channel, Do you read the chapter 45.5.1.7 Transceiver driver enable, from the RM and do not understand?

I review the RM and in the UARTx_MODEM[RXRTSE] the assertion is controlled by this, and this will change depending on the baud rate.

Best regards,
Pavel

 

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