SK-96380-120PMC User Guide
Chapter 3 Jumpers and Switches
© Fujitsu Microelectronics Europe GmbH
- 15 -
UG-960019-11
3.2 Power
Supply
(S2, JP: 8, 15, 16, 17, 22)
The on-board voltage regulator provides stabilized 5V
*1
and 3.3V supplies to the MCU
*1
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.
S2
Power
Switch
JP8
Core power supply stabilization capacitor
JP15
Selects the power supply voltage for the microcontroller
JP16
Connects the power supply voltage to the microcontroller. An ampere meter can be
used instead for power consumption measurement.
JP17
Selects the Stepper Motor Driver Voltage (3.3V or 5V)
JP22
Jumper to override the power switch S2
Jumper
Setting
Description
Closed
An external capacitor is connected
JP8
(C-pin)
Open
An external capacitor is not connected
1 - 2
Power supply (VCC) for MCU is set to 5V
JP15
(MCUVCC)
2 - 3
Power supply (VCC) for MCU is set to 3V3
1 - 2
MCU is disconnected from VCC
JP16
(MCUVCC)
2 - 3
MCU is connected to VCC
1 - 2
SMC (DVCC) supply voltage is set to 5V
JP17
(DVCC)
2 - 3
SMC (DVCC) supply voltage is set to 3.3V
Closed
Board is always switched on
JP22
(Mains)
Open
Board power is controlled by switch S2
Table 3-2: Power Supply Configuration
By default, all Board supplies are set to 5V.