SK-96390-100PMC User Guide
Chapter 2 Jumpers and Switches
UG-960017-11
- 14 -
© Fujitsu Microelectronics Europe GmbH
2.2 Power
Supply
(JP: 29, 30, 37, 40, 43, 49)
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.
JP29
Selects the power supply voltage for the microcontroller
JP30
Selects the Stepper Motor Driver Voltage (3.3V or 5V)
JP37
Connects the power supply voltage to the microcontroller. An ampere meter can be
used instead for power consumption measurement.
JP40
Core power supply stabilization capacitor
JP43
Jumper to switch board on, off or connect an external switch
JP49
Stepper Motor Driver VSS
Jumper
Setting
Description
1 - 2
Power supply (VCC) for MCU is set to 5V
JP29
(VCC 5V/3,3V)
2 - 3
Power supply (VCC) for MCU is set to 3V3
1 - 2
SMC (DVCC) supply voltage is set to 5V
JP30
(DVCC)
2 - 3
SMC (DVCC) supply voltage is set to 3.3V
Closed
MCU is connected to VCC
JP37
(MCUVCC)
Open
MCU is disconnected from VCC
Closed
An external capacitor is connected
JP40
(C-pin)
Open
An external capacitor is not connected
Closed
Board is switched on
JP43
(Power)
Open
Board is switched off
Closed
SMC (DVSS) connected to VSS
JP49
(DVSS)
Open
SMC (DVSS) connected to VSS
Table 2-2: Power Supply Configuration
By default, all Board supplies are set to 5V.