Copyright
©
2019
congatec
AG
JCWLm10
50/55
6.4
congatec Board Controller (cBC)
The conga-JC370 is equipped with a Microchip MEC1705 microcontroller. This onboard microcontroller plays an important role for most of the
congatec BIOS features. It fully isolates some of the embedded features such as system monitoring, I²C bus from the x86 core architecture. The
isolation helps improve performance and reliability even when the x86 processor is in a low power mode.
6.4.1
Fan Control
The cBC uses the PWM (FAN_PWMOUT) signal to adjust the rotational speed of the fan without changing the fan’s input voltage. Additionally,
the FAN_TACHOIN signal provides the ability to monitor the system’s fan RPMs (revolutions per minute). For accurate RPM reading, the
FAN_TACHOIN signal must receive two pulses per revolution. Therefore, a two pulse per revolution fan or similar hardware solution is
recommended.
6.4.2
Power Loss Control
The cBC has full control of the power-up of the SBC; therefore, it 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”.
6.4.3
Board Information
The cBC provides a rich data-set of manufacturing and board information such as serial number, EAN number, hardware and firmware revisions.
It also keeps track of dynamically changing data like runtime meter and boot counter.
6.5
OEM BIOS Customization
The conga-JC370 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:
6.5.1
OEM Default Settings
This feature allows system designers to create and store their own BIOS default configuration. Customized BIOS development by congatec for
OEM default settings is no longer necessary because customers can easily perform this configuration by themselves using the congatec system
