Power Supply - Fujitsu SK-91F467D-208PFV User Manual

3.2 Power Supply

There are four on-board switching regulators to provide the voltages 5 V, 3.3 V, 2.5 V and
1.8 V on the Starterkit. With the power ON/OFF-switch S8 or S9 (S9 is a soldering option to
use a different switch), the main input voltage from DC-connector X5 will be connected to the
Vin voltage of the board. The Vin voltage supplies the switching regulators.
Switch
S8 or S9
Default: grey
With JP91 the pins B14, B15 and B16 of the external bus interface connector X14 can be
connected to the Vin voltage, so that it is possible to supply the board from an external
connected board.
There is a triple supply monitor on-board, which monitors three of the four DC output
voltages and generates a system reset, in case with wrong levels of the on board voltages.
5 V and 3.3 V are always monitored and the third monitored voltage can be selected with the
solder jumpers JP42 and JP43.
With JP68 it is possible to select the whole board supply voltage Vcc to 5 V or 3.3 V
Jumper
ON (closed)
JP91
OFF (open)
ON (closed)
JP42
OFF (open)
ON (closed)
JP43
OFF (open)
JP68
Default: grey
FMEMCU-UG-910014-10
SK-91F467D-208PFV V1.1
Jumpers and Switches
Setting Description
ON (1-2) Power ON
OFF (2-3) Power OFF
Table 3-2: Power Switch
Setting Description
Vin is connected to X14 pins B14, B15 and B16
Vin is not connected to X14 pins B14, B15 and B16
Vcc1V8 is connected to supply monitor
Vcc1V8 is not connected to supply monitor
Vcc2V5 is connected to supply monitor
Vcc2V5 is not connected to supply monitor
1-2 Vcc is connected to 5 V
2-3 Vcc is connected to 3.3 V
Table 3-3: Power supply configurations
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