Preliminary User's Manual l TQMaX4XxL UM 0001 l © 2022, TQ-Systems GmbH
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Per default the signal is connected with a pullup to V_5V_IN (5.0V), therefore only a LOW can reset the module with power cycle.
3.2.9.1.2
MCU_PORz
The MCU_PORz signal is used to control a cold reset. Between the LGA balls MCU_PORz and the AM64x / AM243x MCU_PORz
signal is an AND element and a supervisor, which keeps the signal at LOW during power sequencing and pulls it HIGH
afterwards.
By default the signal is connected with a pullup to 1.8V, so only a LOW can trigger a cold reset of the module.
3.2.9.1.3
MCU_RESETz
The MCU_RESETz signal is used to control a warm reset of the MCU domain of the AM64x / AM243x.
By default the signal is connected to a pullup to 1.8V, so only a LOW can trigger a warm reset of the MCU domain on the module.
3.2.9.1.4
RESET_REQz
The RESET_REQz signal is used to control a warm reset of the main domain of the AM64x / AM243x.
By default the signal is connected to a pullup to 1.8V, so only a LOW can trigger a warm reset of the main domain on the module.
3.2.9.2
Reset Status (Output)
3.2.9.2.1
PORz_OUT
The PORz_OUT signal serves as status signal for a cold reset of the main domain of the AM64x / AM243x.
By default the signal is driven via a buffer with 1.8V.
3.2.9.2.2
MCU_RESETSTATz
The MCU_RESETSTATz signal serves as a status signal for a warm reset of the MCU domain.
By default the signal is connected with a pulldown to ground.
3.2.9.2.3
RESETSTATz
The RESETSTATz signal serves as a status signal for a warm reset of the main domain.
By default the signal is connected with a pulldown to ground.
3.2.9.2.4
TQMaX4XxL_PGOOD
TQMaX4XxL_PGOOD serves as a status signal to the base board that the voltages on the main board can now be switched on.
Power GOOD (PGOOD) is only active when the power sequencing on the module has been successfully completed.
3.2.10
Watchdog
The AM64x / AM243x provides a Watchdog Timer. If the Watchdog-Timer is active and not reset within the specified time,
triggers a Warm-Reset. For more information, refer to the AM64x / AM243x Reference Manual (3).
