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Home/Questions/Q 64
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Arjun B
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Arjun B
Asked: February 4, 20222022-02-04T11:04:21+05:30 2022-02-04T11:04:21+05:30In: Microcontroller

Change of SPI Baud Rate in Renesas RL78

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

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      Sandeep Kondhalkar
      2022-05-13T12:42:52+05:30Added an answer on May 13, 2022 at 12:42 pm

      The transfer clock frequency for 3-wire serial I communication can be calculated by the following expressions.(1) For Master(Transfer clock frequency) = {Operation clock (fMCK) frequency of target channel} ÷ (SDRmn[15:9] + 1) ÷ 2 [Hz](2) For Slave(Transfer clock frequency) = {Frequency of serial cloRead more

      The transfer clock frequency for 3-wire serial I communication can be calculated by the following expressions.
      (1) For Master
      (Transfer clock frequency) = {Operation clock (fMCK) frequency of target channel} ÷ (SDRmn[15:9] + 1) ÷ 2 [Hz]
      (2) For Slave
      (Transfer clock frequency) = {Frequency of serial clock (fSCK) supplied by master}Note [Hz]
      Note :The permissible maximum transfer clock frequency is fMCK/6.
      Remark :The value of SDRmn[15:9] is the value of bits 15 to 9 of serial data register (SDRmn) (0000000B to 1111111B) and therefore is 0 to 127. The operation clock (fMCK) is determined by serial clock select register m (SPSm) and bit 15 (CKSmn) of serial mode register mn (SMRmn).

       

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    2. shivali chauhan
      2022-05-13T13:50:32+05:30Added an answer on May 13, 2022 at 1:50 pm
      Change of SPI Baud Rate in Renesas RL78

      Hi Sir,   There are two option for change the spi baudrate. First, you can go code generators setting in RL78 any MCU.  Please find the below attachments.     Second option you can follow the attachments(screenshot)of calculate transfer frequency.      Thanks & Regards Read more

      Hi Sir,

       

      There are two option for change the spi baudrate.

      First, you can go code generators setting in RL78 any MCU.  Please find the below attachments.

       

       

      Second option you can follow the attachments(screenshot)of calculate transfer frequency. 

       

       

      Thanks & Regards 

      Shivali Singh

       

       

       

       

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