How to Change SPI Baud Rate in Renesas RL78 Series—Steps and Register Settings

How to change SPI Baud Rate in Renesas RL78 ? What are the steps to change SPI Baud Rate in Renesas RL78 series.

Since there has been no response to this post, and I have never used the processor family, the first place to try would be the forum at https://renesasrulz.com/mcu-mpu/rl78
You need to look at the registers associated with SPI in the data sheets, the bit values for the baud rates will be listed, normally it is just a question of writing the appropriate bits to the SPI baud rate register, but without looking at the data sheets myself, I can't know exactly what is needed,
cheers,
Richard

Hi,
From web:
To change baudrate you have to do:
1. determine the CSI module used
2. determine fclk
3. check CSI to set the desired baudrate.
G

To change the SPI baud rate in a Renesas RL78 series microcontroller, you will need to follow these steps:

1. Set the clock frequency of the microcontroller. The clock frequency determines the maximum baud rate that can be achieved. You can set the clock frequency using the oscillator circuit or by using a clock generator.

2. Configure the microcontroller for SPI communication. This involves setting the appropriate pins for the MISO, MOSI, and SCK signals and enabling the SPI module in the microcontroller's configuration registers.

3. Set the baud rate divider. The baud rate is determined by dividing the clock frequency by a divider value. You can set the divider value using the microcontroller's configuration registers.

4. Initialize the SPI module. This involves setting the appropriate options in the configuration registers, such as the clock phase and polarity, data width, and slave or master mode.

5. Send and receive data using the SPI module. Once the SPI module is initialized, you can use the microcontroller's built-in functions to send and receive data over the SPI bus.

It's important to note that the steps above are general guidelines and may vary depending on the specific microcontroller and development environment you are using. Refer to the microcontroller's documentation and the documentation for your development environment for more detailed instructions.