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2017
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6.3
Security Features
The conga-IA5 provides a firmware TPM 2.0 (Intel
®
PTT). Follow the steps below to enable or disable the firmware TPM 2.0:
•
enter the BIOS setup menu (see section 10.1 "Navigating the BIOS Setup Menu")
•
navigate to
Advanced Setup
menu
•
navigate to
Platform Trust Technology
submenu and press ENTER
•
enable or disable fTPM
Note
1. The conga-IA5 supports discrete LPC TPM 2.0 (Infineon SLB9665) or discrete LPC TPM 1.2 (Infineon SLB9660) via assembly option.
2. Always disable fTPM (firmware TPM) if you use a discrete TPM.
6.4
congatec Board Controller (cBC)
The conga-IA5 is equipped with a Texas Instruments Tiva™ TM4E1231H6ZRBI 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 or the I²C bus from the x86
core architecture, which results in higher embedded feature performance and more reliability, even when the x86 processor is in a low power mode.
6.4.1
Fan Control
The conga-IA5 has additional signals and functions to further improve system management. One of these signals is an output signal called
FAN_PWMOUT 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.
6.4.2
Power Loss Control
The cBC has full control of the power-up of the SBC, 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”.
