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4.6 Power Supply (JP: 29, 30, 34, 40, 47)
The on-board voltage regulator provides stabilized 5V and 3.3V supplies to the MCU and
peripherals. Even though they are thermally protected against overload, care must be taken
when supplying current for additional circuitry.
The LIN Vs line can be connected directly to the input supply of the board by jumpers. In this
case, the input voltage to the board has to be suitable for the connected bus devices (mostly
around 12V). Since there is a protection diode between Vin and Vs, it is not possible to
power the board over the LIN bus.
JP34 Connects the power supply voltage to the microcontroller. An ampere meter can be
used instead for power consumption measurement.
JP30 Selects the power supply voltage for the microcontroller
JP40 Core power supply stabilization capacitor
JP47 Jumper to switch board on, off or connect an external switch
Jumper
JP29
(int/ext VCC)
JP30
(VCC 5V/3,3V)
JP34
(MCUVCC)
JP40
(C-pin)
JP47
(Power)
Rule 4: By default, all Board supplies are set to 5V.
Note:
In case that the board is powered via the VG-connector (X4), a regulated 5 V power
source has to be used and JP29 setting must be 2-3.
© Fujitsu Semiconductor Europe GmbH
SK-96620_350-64PMC(1) User Guide
Chapter 4 Jumpers and Switches
Setting
Description
1 - 2
On-board voltage regulation
2 - 3
External power-supply from X4 pin 1
1 - 2
Power supply (VCC) for MCU is set to 5V
2 - 3
Power supply (VCC) for MCU is set to 3V3
Closed
MCU is connected to VCC
Open
MCU is disconnected from VCC
Closed
An external capacitor is connected
Open
An external capacitor is not connected
Closed
Board is switched on
Open
Board is switched off
Table 4-5: Power Supply Settings
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UG-960028-12
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