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Systems that support the low-power idle state do not use power states S3 and S4.
To power on from states S3, S4 and S5 use
Power Button
WakeOnLAN (S3, S4)
The OS must support wake up from an USB device and the carrier board must power the
USB port with the standby voltage.
3.5.2 Embedded Controller - Hardware Monitor
The embedded controller (EC) provides a broad set of functionality:
- monitoring the module's processor temperature, power supply voltages (VCC /5 VSB), battery
voltage V_BAT
- monitoring and configuring the on-board and external fans
- acting as hub or super-IO for low speed interfaces such as UART, I2C/SMB, GSPI, GPIO
- supporting watchdog functions
The EC is accessible through the API in the Board Support Package.
3.5.3 TPM
Trusted Platform Module is a BOM Option with the Infineon SLB9672 connected to SPI.
3.5.4 Watchdog
The watchdog timer interupt (WD_OUT) is a hardware or software timer implemented by the module
to the carrier board if there is a fault condition in the main program; the watchdog triggers a system
reset or other corrective actions after a specific time, with the aim to bring the system back from a
non-responsive to normal state.
The COMh-caRP supports an independently programmable watchdog that works with two stages that
can be used stage by stage.
No action
Reset
Delay → No action
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Stage is off and will be skipped
Restarts the module and starts a new POST and operating system
Might be necessary when an operating system must be started and
the time for the first trigger pulse must be extended. Only available in
the first stage!
COMh-caRP User Guide
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