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Product Manual
JFLEX-Multimedia
Kontron Embedded Modules GmbH
16
Revision 1.2
4.6 Power
If a not self powered Firewire (1394) device is connected it is strictly
recommended to use this power connector for additional power supply.
Otherwise the JFLEX-Multimedia or the JRex board can get permanently
damaged.
4.6.1 Connector (X6)
Pin
Pin Function
1
+5V DC
2
GND
3
GND
4
+12V DC
4.6.2 3,3V DC-DC Switching Regulator
When operating the JRex CPU board with a 5V-only Power supply the JFLEX-
Multimedia with assembled 3,3V option can be used to generate the desired 3,3V
for the CPU board.
This is done with a LM2636 Switching regulator. The maximum current is 2,5 A.
Attention:
Most current from 3,3V is drawn by the SDRAM module. The user
has to make sure when selecting a SDRAM module not to exceed
the maximum current.
Attention:
Do not connect an ATX power supply with 3,3V output, when
JFLEX-Multimedia with mounted 3,3V regulator is connected. The
3,3V source will get permanently damaged !
1
2
3
4