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3.2 Power Supply (JP: 29, 37, 43, 44, 45)
Two onboard voltage regulators provide 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 JP44 and
JP45. 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.
JP29 Selects the MCU IO and peripherals Vcc voltage (3.3V or 5V)
JP37 Connects the MCU IO voltage to Vcc. Could be used for current measurement.
JP43 Main supply on / off
JP44 Connects LIN Vs (Pin 1 of X8) to Vin
JP45 Connects LIN Vs (Pin 1 of X6) to Vin
Jumper
JP29
(VDD5 3V/5V)
JP37
(VDD5)
JP43
(Mains on/off)
JP44
(VBAT_A)
JP45
(VBAT_B)
© Fujitsu Microelectronics Europe GmbH
SK-96320-80PMC User Guide
Chapter 3 Jumpers and Switches
Setting
Description
1 - 2
MCU / Peripherals @ 5V
2 - 3
MCU / Peripherals @ 3.3V
Closed
Power supply Vcc connected to VDD5
Open
Power supply Vcc not connected to VDD5
Closed
The board is switched on
Open
The board is switched off
Closed
Vs of LIN A is powered by the board
Open
No voltage supply to Vs of LIN A
Closed
Vs of LIN B is powered by the board
Open
No voltage supply to Vs of LIN B
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FMEMCU-UG-960010-11
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