SK-96320-80PMC User Guide
Chapter 3 Jumpers and Switches
© Fujitsu Microelectronics Europe GmbH
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FMEMCU-UG-960010-12
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
Setting
Description
1 - 2
MCU / Peripherals @ 5V
JP29
(VDD5 3V/5V)
2 - 3
MCU / Peripherals @ 3.3V
Closed
Power supply Vcc connected to VDD5
JP37
(VDD5)
Open
Power supply Vcc not connected to VDD5
Closed
The board is switched on
JP43
(Mains on/off)
Open
The board is switched off
Closed
Vs of LIN A is powered by the board
JP44
(VBAT_A)
Open
No voltage supply to Vs of LIN A
Closed
Vs of LIN B is powered by the board
JP45
(VBAT_B)
Open
No voltage supply to Vs of LIN B
