Congatec Com Express conga-TC570 - Enhanced Soft-Off State; Fan Control; OEM BIOS Customization; Power Loss Control

Copyright © 2021 congatec GmbH TCTLm02 34/67
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-TC570 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-TC570 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).
Refer to congatec application note AN36_Enhanced_Soft_Off.pdf for detailed description of the S5e state.
6.2 OEM BIOS Customization
The conga-TC570 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: