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AM2434: Bootmode Pins

Hatem Salah
Prodigy 160 points

Part Number: AM2434

Hi,

I have a question regarding the boot mode switches on the AM2434 EVM Board (The Green Big Board). We are now trying to make our custom board using the AM2434 SoC but those pins are multiplexed with other peripherals (e.g. UART). There's a constraint that we won't be able to add the same switches to our board. Our first thought was to just pull it up or down right away, but we are not sure if that would affect the other multiplexed peripherals.

I need to know how the board handles the booting modes switches and the peripherals at the same time. I'm also asking for any suggestings to eliminate the switches while having a single bootmode option at least for sure.

Thank you in advance

  • 0
    TI__Mastermind 25030 points

    Hi Hatem,

    BOOTMODE pins are being latched right after POR release. They must be driven high or low via pull up/down resistors during POR release to capture the requested boot mode. Afterwards, these pins can be re-used as per muxing table in the datasheet. Users must ensure these pins are not being driven by external devices during that time. It is easily achieved if BOOTMODE pins are used as outputs, otherwise, as already mentioned, care must be taken these pins not to be driven by external ICs right after POR.

    Best Regards,

    Stan