Fujitsu SK-91464A-100PMC User Manual - Page 16

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3.8 CAN"A" (JP: 25, 26)

One high-speed CAN-transceiver can be connected to the microcontroller's CAN interface.

JP25, JP26 connects a CAN-port to the CAN-transceiver (U7, X10).

If the CAN interface is not used then the jumpers should be left open.

Jumper

JP25 (CAN"A"TX)

JP26 (CAN"A"RX)

3.9 Reset-Generation (JP: 3, 4, 5, 7, 24, 35)

In addition to the internal Power-On reset, the microcontroller can be reset by an external

reset circuit (Voltage Monitor) and also by a RS232 interface.

JP3, JP5 As well the DTR-line as the RTS-Line of UART"A" or UART"B" can be used

to generate a system reset.

JP4

This jumper selects whether the DTR/RTS line from UART"A" or UART"B"

will generate a system reset.

JP7

This solder jumper selects between normal (immediate) reset and delayed reset.

In delayed reset mode, the reset button has to be held down for 2 sec before a

reset is generated to avoid accidental resets.

JP24

Open this jumper if no external Reset shall be generated.

In this case only the internal reset is active (e.g.: power-on)

JP35

The signal on the DTR/RTS line can be negated with this jumper.

Remove the jumper in order to disable the RS232 reset circuit.

Jumper

JP3 (DTR / RTS "A")

JP4 (UART"A"/"B")

JP5 (DTR / RTS "B")

JP7

(Reset imm./delayed)

JP24 (Main Reset)

JP35 (Polarity)

FMEMCU-UG-910025-15

SK-91464A-100PMC User Guide

Chapter 3 Jumpers and Switches

Setting

Description

closed

TX4 of MCU is connected to CAN"A"

closed

RX4 of MCU is connected to CAN"A"

Setting

Description

1-2

DTR of UART"A" is selected

2-3

RTS of UART"A" is selected

1-2

UART"A" is used to generate Reset

2-3

UART"B" is used to generate Reset

1-2

DTR of UART"B" is selected

2-3

RTS of UART"B" is selected

1-2

Reset is applied immediately when SW6 is pressed

2-3

Reset is applied when SW6 is pressed >2sec

Closed

External Reset generation is active

Open

No external Reset generation

1-2

No negation for the DTR/RTS signal

2-3

DTR/RTS signal is negated

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