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vikas Nagpal
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vikas Nagpal
Asked: May 30, 2023In:
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Hi We observe sudden changes and flickering especially at low position luminosity. attached oscilloscopecapture_1 is taken at one of the green LED channels. During the dimming cycle, the ghost pattern causes momentary flashes in LED brightness. again oscilloscopecapture_2.PNG and oscilloscopecapture_3.PNG are taken at ...Read more

Hi

We observe sudden changes and flickering especially at low position luminosity.

attached oscilloscopecapture_1 is taken at one of the green LED channels. During the dimming cycle, the ghost pattern causes momentary flashes in LED brightness.

again oscilloscopecapture_2.PNG and oscilloscopecapture_3.PNG are taken at one of the green channels. In this case, the LOW side resistor of the output driver value decreased; and noticed a noise at the ON state. There’s also a flicker in this case and we suppose the cause is the noise seen in oscilloscopecapture_3.PNG.

The flickering and flashing are substantially seen at low luminosity values.

Do you have any suggestions on fixing these?

our design is

LED7708 has 10 channels active, and 8 LEDs on each channel. There are 4 LED7708s on the same board.

LED PN osram LRTB GVTG

Thanks

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flashingflickeringled7708
  1. ashishgawade

    Hello, C19 (parallel to Riseth resistor) marked as NC in the evaluation board schematics, was populated in our design. Removing this cap. solved the problem. Thank You

    Hello,

    C19 (parallel to Riseth resistor) marked as NC in the evaluation board schematics, was populated in our design. Removing this cap. solved the problem. Thank You

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ashishgawade
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ashishgawade
Asked: December 22, 2022In:
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Dear Volt Team, We’ve some questions related to the product/ manufacturing of custom boards using RA4M2 MCU. 1. Is multiple boards flashing at a time supported? If yes, please share the documents for the tools and configuration. 2. How do we handle the ...Read more

Dear Volt Team,

We’ve some questions related to the product/ manufacturing of custom boards using RA4M2 MCU.

1. Is multiple boards flashing at a time supported? If yes, please share the documents for the tools and configuration.

2. How do we handle the MD pin in case of multiple board flashing, without manual intervention?

Regards & Thanks,

AG

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boardflashingmcupinra4m2renesas
  1. vikas Nagpal

    Hello Ashish, Thanks for sharing your question with Volt.Tech Engineering Community! Yes, you can program multiple devices with Renesas Flash Programmer. For Renesas Flash Programmer's latest performances from V3.05.00 or later you can create a single design and specify the serial number of each emuRead more

    Hello Ashish,

    Thanks for sharing your question with Volt.Tech Engineering Community!
    Yes, you can program multiple devices with Renesas Flash Programmer. For Renesas Flash Programmer’s latest performances from V3.05.00 or later you can create a single design and specify the serial number of each emulator( E1 emulator/ E2/ E2 Lite) in the tool option when starting RFP via command.

    You can find all the necessary tools, manuals, and documents.
    https//www.renesas.com/us/en/software-tool/renesas-flash-programmer-programming-gui#overview

    As far as it concerns the MD pin then’s the suggested connection from the RA4M2 hardware manual for JTAG, SWD, and Serial Programming


    Generally, this pin should be high in debug mode and low when programming the device( flashing).
    Then there’s a different manual for e2 programmers.

    https//www.renesas.com/document/man/e2-emulator-e2-emulator-lite-additional-document-users-manual-notes-connection-ra-devices-0
    And let us know!

    Kind Regards,
    Vikas Nagpal

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vikas Nagpal
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vikas Nagpal
Asked: November 4, 2022In:
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Hello, I am going to flash the controller via ESP- PROG Board. Do I need external quartz for the controller in this case? Thank you for your help!

Hello,

I am going to flash the controller via ESP- PROG Board.
Do I need external quartz for the controller in this case?

Thank you for your help!

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boardconnectivityesp- progesp32ESP32-C3flashingwireless
  1. ashishgawade

    Yes, the C3 always needs a crystal to do anything, including flashing.

    Yes, the C3 always needs a crystal to do anything, including flashing.

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pallavi sharma
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pallavi sharma
Asked: May 21, 2022In:
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In Renesas RH850, CS+ IDE , DCU cannot be accessed it shows error(E1203184) while Flashing from E1 emulator, even when all connections are correct. How do I resolve this issue?

In Renesas RH850, CS+ IDE , DCU cannot be accessed it shows error(E1203184) while Flashing from E1 emulator, even when all connections are correct. How do I resolve this issue?

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CS+IDEDCUE1 emulatorflashingrenesasRenesas Microcontrollerrh850
  1. Rahul B

    Hello Pallavi, For that first download self check programm of E1 emulator from Renesas website, and confirm is it passed and ok to use.

    Hello Pallavi,

    For that first download self check programm of E1 emulator from Renesas website, and confirm is it passed and ok to use.

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