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Home/ra2a1

volt.tech Latest Questions

Alex thomas
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Alex thomas
Asked: March 16, 2023In: Microcontroller

How to use RA2A1 MCU at 5V Power Supply?

  • 0

Hello, I am planning to use RA2A1 MCU for a design with 24-bit ADC sampling and relay control. Because there are many 5V peripherals in this system, it’ll be much simple if the RA2A1 runs at a 5 Volt power supply. Most ...Read more

Hello, I am planning to use RA2A1 MCU for a design with 24-bit ADC sampling and relay control.

Because there are many 5V peripherals in this system, it’ll be much simple if the RA2A1 runs at a 5 Volt power supply.

Most of the RA2A1 examples are running at a 3.3 V power supply, what’s the potential problem if run at a 5 V power supply?

Regards

Alex Thomas

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mcumicrocontrollersmicroprocessorspowerra2a1renesassupplyvolt
  1. vikas Nagpal
    Added an answer on March 17, 2023 at 10:28 am

    Hello, None RA2 family can run from 1.6 V to 5V. The data sheet & hardware user manual that can be found on the Renesas web give further detail. Thank You

    Hello, None RA2 family can run from 1.6 V to 5V.

    The data sheet & hardware user manual that can be found on the Renesas web give further detail.

    Thank You

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  • 1 Answer
Answer
Alex thomas
  • 0
Alex thomas
Asked: March 1, 2023In: Microcontroller

Is switching in MCUBoot is Atomic?

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Hi, I am curious to understand that switching operations in RA2A1 MCUboot is Atomic. However, what happens if it fails during the exchange operation in MCUboot? If it isn’t atomic programming. Thanks and Appreciate for sharing your knowledge. Best regards, Alex Thomas

Hi,

I am curious to understand that switching operations in RA2A1 MCUboot is Atomic.

However, what happens if it fails during the exchange operation in MCUboot?
If it isn’t atomic programming.

Thanks and Appreciate for sharing your knowledge.

Best regards,

Alex Thomas

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atomicmcubootra2a1renesasswitching
  1. nidhi singh
    Added an answer on March 2, 2023 at 10:37 am

    Hi Alex, The exchange mode for MCU boot uses the scratch area as an intermediate area in order to complete the exchange of the 2 images. The process of switching is done like below. However, then no information is lost, If a power failure occurs. The scratch area must be large enough to store the laRead more

    Hi Alex,

    The exchange mode for MCU boot uses the scratch area as an intermediate area in order to complete the exchange of the 2 images. The process of switching is done like below. However, then no information is lost, If a power failure occurs.

    The scratch area must be large enough to store the largest sector that’s going to be shifted. For RA2 MCUs, the scratch area should be set up to 0x800 when exchange mode is used.

    Regards

    Nidhi Singh

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  • 1 Answer
Answer
vikas Nagpal
  • 0
vikas Nagpal
Asked: January 11, 2023In: Microcontroller

How RA2A1 24 Bit Single end input measure negative signal?

  • 0

Hello, I am thinking to use RA2A1 MCU to measure a very small AC (50Hz) signal, perhaps millivolt range or lower, but it’s sin wave that has negative amplitude, is RA2A1 MCU single-end input can handle negative signal? Thank You

Hello,

I am thinking to use RA2A1 MCU to measure a very small AC (50Hz) signal, perhaps millivolt range or lower, but it’s sin wave that has negative amplitude, is RA2A1 MCU single-end input can handle negative signal?

Thank You

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mcumicrocontrollerra mcura2a1renesasRenesas Microcontrollersignal
  1. Alex thomas
    Added an answer on January 18, 2023 at 11:50 am

    Hi, You can find the input voltage range in differential input mode in Table 33.7: Thank You

    Hi,

    You can find the input voltage range in differential input mode in Table 33.7:

    Thank You

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  • 1 Answer
Answer
vishalkashbar
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vishalkashbar
Asked: August 24, 2022In: Microcontroller

RA2A1- CAN Machine between 2 RA2A1 MCUs

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Hi I am veritably new to CAN communication now I am working on transmitting and entering data between 2 RA2A1 MCUs but I do not know how to configure the CAN configuration on the alternate board. I have previously tested the ...Read more

Hi

I am veritably new to CAN communication now I am working on transmitting and entering data between 2 RA2A1 MCUs but I do not know how to configure the CAN configuration on the alternate board. I have previously tested the circle- reverse mode on the first board, it’s working OK , but when I connect tx and rx of the first board to the alternate board, it wasn’t working. Here is my configuration.

and then are the lines that I used to flash into the first board and alternate board, thank you in advance.

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boardcirclemachinemcusra2a1Renesas Microcontroller
  1. Sandeep kumar
    Added an answer on August 26, 2022 at 9:46 pm

    Have you added the CGC driver, and started the Main Oscillator before calling R_CAN_Open()? err = R_CGC_Open (&g_cgc0_ctrl, &g_cgc0_cfg); if (FSP_SUCCESS != err) { __BKPT(0); //TODO better error handling } err = R_CGC_ClockStart (&g_cgc0_ctrl, CGC_CLOCK_MAIN_OSC, NULL); if (FSP_SUCCESS !Read more

    Have you added the CGC driver, and started the Main Oscillator before calling R_CAN_Open()?

    err = R_CGC_Open (&g_cgc0_ctrl, &g_cgc0_cfg);
    if (FSP_SUCCESS != err)
    {
    __BKPT(0); //TODO better error handling
    }
    err = R_CGC_ClockStart (&g_cgc0_ctrl, CGC_CLOCK_MAIN_OSC, NULL);
    if (FSP_SUCCESS != err)
    {
    __BKPT(0); //TODO better error handling
    }

    do
    {
    err = R_CGC_ClockCheck(&g_cgc0_ctrl, CGC_CLOCK_MAIN_OSC);
    }while(FSP_ERR_NOT_STABILIZED == err);
    if (FSP_SUCCESS != err)
    {
    __BKPT(0); //TODO better error handling
    }

    /* Initialize CAN module */
    err = R_CAN_Open(&g_can0_ctrl, &g_can0_cfg);
    /* Error trap */
    if(FSP_SUCCESS != err)
    {
    __BKPT(0); //TODO better error handling
    }

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  • 2 Answers
Answer

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    ashishgawade added an answer Hello, The USB-serial-JTAG port can usually reset/put the chip into… March 30, 2023 at 11:00 am
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    ashishgawade added an answer Hi Nidhi, Thanks for reaching out to Volt.Tech Engineering Community.… March 28, 2023 at 10:13 am
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    ashishgawade added an answer Hello@vikas, It's always recommended to use a bleeder of 100 ohms. Vout of the part has an offset… March 24, 2023 at 9:55 am
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    vikas Nagpal added an answer Hello, The SMPS reduces the power loss when VDD is… March 22, 2023 at 10:30 am
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    nidhi singh added an answer Hello Ashish, No, sorry, that kind of setup is physically… March 20, 2023 at 10:45 am

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