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6.5
Optional CAN Header
The conga-IC370 offers an assembly option for up to two CAN buses (X46). For more information, contact congatec technical support team.
Table 52 Optional X46 Pinout Description
Pin Signal
Description
1
CAN2_L
CAN2 dominant low
2
GND
Ground
3
CAN2_H
CAN2 dominant high
4
12V_CAN1
12 V runtime power with 500 mA fuse (first CAN bus)
5
12V_CAN2
12 V runtime power with 500 mA fuse (second CAN bus)
6
CAN1_H
CAN1 dominant high
7
GND
Ground
8
CAN1_L
CAN1 dominant low
Connector Type
X46: 2.54 mm, 8-pin (4 x 2 rows) header
6.6
congatec Board Controller (cBC)
The conga-IC370 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.
6.6.1
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.
