Connecting The Power Supply - NEC AB-050-FX3-U User Manual

NEC Electronics (Europe) GmbH
4

Connecting the Power Supply

Power can be supplied to the board either
a) by directly supplying the device operating voltage, or
b) via the onboard 7805 type voltage regulator.
Direct voltage supply:
A direct supply of the device operating voltage can either be implied by using CN7 to connect VCC (typical +5V for
Fx3 devices) and CN8 to connect VSS (0V), or by using CN1.
As the supplied voltage is directly connected to the device the input voltage must not exceed the specified power
supply voltage range of the assembled device.
Close JP1 1-2 when directly supplying the devices voltage.
Voltage regulator supply:
Use CN1 to supply a stabilized voltage of 6V - 12V to the board. The on board 7805 type regulator will generate the
5V supply of the board.
Close JP1 2-3 when using the on board voltage regulator.
Caution: On CN1 the inner pin connects to VSS and the outer pin connects to VCC.
Applying a voltage to the device outside the specified device operating voltage range may damage
the device!
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