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question about reset

1330hayacool7102
Guru 10655 points

hi friends,

by chekcing following in sprugx8.pdf

do you know which RST inside red rectangular(like DEF_DOM_RST, ACT_DOM_RST) cause the real ARM reboot?

  • 0
    TI__Guru**** 170625 points

    Hi Jack,

    If you refer to the ARM in the Cortex-A8 MPU subsystem, the reset signals are MPU_AO_RST, MPU_PWRN_RST and MPU_RST. See TRM, section 18.5.5 MPU Subsystem POR Sequence and section 18.5.6 MPU Subsystem Warm Sequence.

    Regards,

    Pavel


  • 0 in reply to Pavel Botev
    TI__Guru**** 170625 points

    As the Cortex-A8 ARM is in the always-on power domain, the ALW_DOM_RST should also reset the ARM. See DM816x datasheet:

    7.1.2 Power Domains

    Always-On Domain
    The always-on domain contains all modules that are required even when the system goes to standby mode. This includes the host ARM and modules that generate wake-up interrupts (for example, UART, RTC, GPIO, EMAC) as well as other low-power IOs.

    Regards,

    Pavel