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AM62A7-Q1: Bootmode config and low power requirement for the design

zenanding
Prodigy 120 points
Part Number: AM62A7-Q1
Other Parts Discussed in Thread: AM62A7

Hi,

We have three questions need your help,

1.How do we need to configure BOOTMODE3-13PIN to start through SD Card? How to configure BOOTMODE3-13PIN if booted through EMMC?

2.Is there a problem with waking up the system through C10 pin during the first power on or system sleep? We require a power consumption of less than 1mA during sleep

3.Could you please provide the GPIO configuration table for AM62A7 so that we can track the current usage of GPIO and check if there are any duplicate uses

  • 0
    TI__Mastermind 27270 points

    Hi ,

    Can you tell me which OS (Linux or FreeRTOS) you are working on ?

    Can you please create separate e2e for each question ?

    So that I can add domain expert to the respective thread to hep you better.

    Best Regards

    Ashwani

  • +1 in reply to Ashwani Goel
    TI__Guru**** 189029 points

    Hi zenanding,

    Refer below answers i received based on the query.

    Please refer the TRM for more information on bootmode configuration

    Query to the expert

    Could you please help me understand if the AM62x supports eMMC backup boot on MMC0 interface.

    Bit 13 0 is reserved and 1 is for MMC1.

    Reply from the expert

    Yes you could set bit 13 to 0 so that port MMC0 would be access for both, but since we only have a single config pin for the backup mode, then it this case the value for the FS/Raw bit would be assume to be filesystem mode. This means that the eMMC device would need to be formatted like a regular SD card to be able to use it as a backup boot mode.

     Additional information 

    Regards,

    Sreenivasa

  • 0 in reply to Ashwani Goel
    Prodigy 120 points

    We use Linux OS. And we use MMC0 for EMMC and MMC1 for SD card. Maybe we don't need backup mode. We can chnage the BOOTMODE pin CONFIG according to the TRM 

  • 0 in reply to zenanding
    TI__Guru**** 189029 points

    Hi zenanding,

    Thank you.

    Please review the comments i have for the SD card interface in the schematics review.

    The Power switch for the SD card supply is required to be ON during power-up to be able to use the SD card interface for boot.

    Please refer SK schematics,

    I marked the pullup.

    Regards,

    Sreenivasa

  • 0 in reply to zenanding
    Prodigy 120 points

    Thanks for your reply. We delete the swith circuit in the desin, Mount a resistor to keep the power supply continuously on, and MMC1 IO pull up use the 3V3DCDC.The 3V3DCDC will always on during power-up, so it's no problem for the SD BOOT. Only some issues with sfatey wuhich we will update in next version update

  • 0 in reply to zenanding
    TI__Guru**** 189029 points

    Hi zenanding,

    Thank you.

    Thank you.

    zenanding said:
    The 3V3DCDC will always on during power-up, so it's no problem for the SD BOOT. Only some issues with sfatey wuhich we will update in next version update

    This is not recommended, it will cause fail-safe issues - SD card on before SoC power is applied. It is recommended to use VCC_3V3_SYS.

    We have made these recommendations for other peripherals in the schematic review.

    Regards,

    Sreenivasa