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vikas Nagpal
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vikas Nagpal
Asked: December 9, 2022In:
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Hi, I am using Ra6m1 MCU I’ve 2 partitions 1. Bootloader partition from 0x00000000 to 0x00010000 flash memory 2. Application partition from 0x00010000 to 0x00080000 The problem I want to use IWDT at the Application partition, I’ve started iwdt at OFS0, but it ...Read more

Hi,

I am using Ra6m1 MCU
I’ve 2 partitions

1. Bootloader partition from 0x00000000 to 0x00010000 flash memory
2. Application partition from 0x00010000 to 0x00080000

The problem I want to use IWDT at the Application partition, I’ve started iwdt at OFS0, but it doesn’t work.

Still, if I change the flash address of the Application partition to 0x00000000, IWDT works typically.

I suppose the problem relates to an option- setting memory position on flash. When I set the start address at 0x00010000( which is different from the initial address 0x00000000) = > the option- setting memory address will start from 0x00010400( according to” Renesas RA6M1 Group User’s Manual Hardware”), but the system may only read 0x00000400 so it keeps iwdt disable.

So how can I solve this problem?

Thank You

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  1. Best Answer
    Alex thomas

    Hi Son, The option-setting memory( where the 0FS0 register exists) determines the state of the MCU after a reset. So this particular address will be read to configure WDT and IWDT when the system boots. The way to change these registers is from the bootloader image, as I explained. You may find someRead more

    Hi Son,

    The option-setting memory( where the 0FS0 register exists) determines the state of the MCU after a reset. So this particular address will be read to configure WDT and IWDT when the system boots. The way to change these registers is from the bootloader image, as I explained.
    You may find some useful information about bootloader applications here.

    Let us know if you have further questions.
    Regards,
    Alex

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ashishgawade
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ashishgawade
Asked: October 13, 2022In:
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The RA6M1 had an external 8-bit external machine that can be used for SRAM access. We need to access a single 8 MB SRAM part. We will need 23 bits of the address to access the part. Can the RA6M1 ...Read more

The RA6M1 had an external 8-bit external machine that can be used for SRAM access. We need to access a single 8 MB SRAM part. We will need 23 bits of the address to access the part.
Can the RA6M1 access an 8- bit wide SRAM part with 3 bytes of address?

Thanks

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  1. nidhi singh

    Hi, Thanks for reaching out to Renesas Engineering Community. As mentioned in Table15.4 in the RA6M1 primer there are 13 address output pins( A12- A00) for each of the 8 CS areas of 8KB. thus, I suppose it isn't possible to connect all 23 address bits simultaneously. Let us know if there are any addRead more

    Hi,

    Thanks for reaching out to Renesas Engineering Community.
    As mentioned in Table15.4 in the RA6M1 primer there are 13 address output pins( A12- A00) for each of the 8 CS areas of 8KB. thus, I suppose it isn’t possible to connect all 23 address bits simultaneously.

    Let us know if there are any additional questions.

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