Message Control Register

I'm using a Infineon C515C, with the RTX51 Full package. However I'm having difficulty addressing the Message Control Register (MCR0 and MCR1) specifically the TXRQ bit in MCR1. Does anyone know where I would find this registers definition?

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  • Pages 6-92 and 6-93.

    http://www.keil.com/dd/docs/datashts/infineon/c515c_um.pdf

    Transmit request
    Indicates that the transmission of this message object is requested by the CPU or via a remote frame and is not yet done. TXRQ can be disabled by CPUUPD. 1) 3)

    1) In message object 15 (last message) these bits are hardwired to "0" (inactive) in order to prevent transmission of message 15.

    3) When the microcontroller requests the transmission of a receive-object, a remote frame will be sent instead of a data frame to request a remote node to send the corresponding data frame.
    This bit will be cleared by the CAN controller along with bit RMTPND when the message has been successfully transmitted, if bit NEWDAT has not been set. If there are several valid message objects with pending transmission request, the message with the lowest message number is transmitted first.

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  • Pages 6-92 and 6-93.

    http://www.keil.com/dd/docs/datashts/infineon/c515c_um.pdf

    Transmit request
    Indicates that the transmission of this message object is requested by the CPU or via a remote frame and is not yet done. TXRQ can be disabled by CPUUPD. 1) 3)

    1) In message object 15 (last message) these bits are hardwired to "0" (inactive) in order to prevent transmission of message 15.

    3) When the microcontroller requests the transmission of a receive-object, a remote frame will be sent instead of a data frame to request a remote node to send the corresponding data frame.
    This bit will be cleared by the CAN controller along with bit RMTPND when the message has been successfully transmitted, if bit NEWDAT has not been set. If there are several valid message objects with pending transmission request, the message with the lowest message number is transmitted first.

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