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DSTXm10
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4.10
Fan Header
The conga-STX7 provides two fan headers for connecting a 3-pin or 4-pin 12 V fan:
•
CPU fan header (X36)
•
System fan header (X38)
The COM Express module controls the speed of the the CPU fan X36 while the BMC controls the speed of the system fan X38. The recommended
maximum power rating for the fans is 9 W.
Table 19 X36/X38 Pinout Description
Pin
Signal
1
GND
2
+12 VDC
3
FAN_TACHOIN
4
FAN_CTRL
Note
1. The connector and pinout complies with 4-Wire Pulse PWM Controlled Fans Specification, Revision 1.3
2. FAN_TACHOIN fan output shall provide two pulses per revolution.
3. The fan must pull up the FAN_CTRL signal to high logic level
Connector Type
X36, X38: 2.54 mm, 4-pin grid fan connector
4.11
SPI Flash Socket
With conga-STX7, you can boot the COM Express module from either the COM module’s onboard BIOS or from an external BIOS. The option
to boot from an external BIOS is useful for evaluating a customized BIOS.
The conga-STX7 features an 8-pin SOIC8 socket U47 for attaching SPI flash. Use DIP switch M19 to select the flash device to boot from. The
table below shows the available configurations.
X36/X38
1 2 3 4
