FUJITSU MB96300 User Manual

Page 15

SK-96370-144PMC-GDC User Guide

Chapter 3 Jumpers and Switches

- 15 -

FMEMCU-UG-960014-10

3.2 Power

Supply

(S2, JP: 8, 15, 16, 17, 22)

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.

S2 Power

Switch

JP8

Core power supply stabilization capacitor

JP15 Selects the power supply voltage for the microcontroller

For SK-96370-144PMC-GDC use only 3.3V, because of the external memory

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
(Not allowed for SK-96370-144PMC-GDC)

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 3.3V.

For SK-96370-144PMC-GDC use only 3.3V, because of the external memory