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6.1.5
Power Loss Control
The cBC has full control of the power-up of the module and therefore can be used to specify the behavior of the system after an AC power loss
condition. Supported modes are “Always On”, “Remain Off” and “Last State”.
6.1.6
Fan Control
The conga-TC570r has additional signals and functions to further improve system management. One of these signals is FAN_PWMOUT,
an output signal that allows system fan control using a PWM (Pulse Width Modulation) output. Additionally, there is an input signal called
FAN_TACHOIN that provides the ability to monitor the system’s fan RPMs (revolutions per minute). This signal must receive two pulses per
revolution in order to produce an accurate reading. For this reason, a two pulse per revolution fan or similar hardware solution is recommended.
Note
1. A four wire fan must be used to generate the correct speed readout.
2. For the correct fan control (FAN_PWMOUT, FAN_TACHIN) implementation, see the COM Express Design Guide.
6.1.7
Enhanced Soft-Off State
The conga-TC570r supports an enhanced Soft-Off state (S5e)—a congatec proprietary low-power Soft-Off state. In this state, the CPU module
switches off almost all the onboard logic in order to reduce the power consumption to absolute minimum (between 0.05 mA and 0.09 mA).
The S5e supports power button, sleep button and SMBALERT# wake events. Refer to congatec application note AN36_Enhanced_Soft_Off.pdf
for detailed description of the S5e state.
6.2
OEM BIOS Customization
The conga-TC570r is equipped with congatec Embedded BIOS, which is based on American Megatrends Inc. Aptio UEFI firmware. The
congatec Embedded BIOS allows system designers to modify the BIOS. For more information about customizing the congatec Embedded
BIOS, refer to the congatec System Utility user’s guide CGUTLm1x.pdf on the congatec website at www.congatec.com or contact technical
support.
The customization features supported are described below:
