Fujitsu FLASH-CAN-48P Benutzerhandbuch - Seite 17

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3.10 Reset-Generation (JP: 3, 4, 24, 35)

Additional to the internal Power-On-Reset the microcontroller can be reset by an external
Reset-circuit (Voltage-Monitor) and by the UART, too.
JP3, JP5 Select DTR- or RTS-Line of UART"A" / UART"B" to generate a system-reset.
This jumper selects whether the DTR/RTS line from UART"A" or UART"B"
JP4
will generate a system-reset.
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 polarity of the DTR/RTS line can be invert by this jumper.
Remove the jumper in order to disable the reset logic.
Jumper
JP3 (DTR / RTS "A")
JP5 (DTR / RTS "B")
JP4 (UART"A"/"B")
JP24 (Main Reset)
JP35 (Polarity)
Default: JP24 = closed (JP3, JP4, JP5 and JP35 are not set)
By default, the external Reset generation is active. The Reset by UART is disabled.
Note:
While a reset signal is asserted the red Reset-LED D14 is lit.
During normal operation, this LED should be off!
If JP35 (Polarity) is set, than JP4 together with JP3 or JP5 have to be set, too.
If the reset LED is steadily on, check the power supply input voltage and the settings for the
reset-generation by UART.
© Fujitsu Semiconductor Europe GmbH
FLASH-CAN-48P
Chapter 3 Jumpers and Switches
Setting
Description
DTR of UART"A" is selected
1-2
RTS of UART"A" is selected
2-3
DTR of UART"B" is selected
1-2
RTS of UART"B" is selected
2-3
UART"A" is used to generate Reset
1-2
UART"B" is used to generate Reset
2-3
closed
external Reset generation is active
open
no external Reset generation
1-2
No polarity inversion for the DTR/RTS signal
2-3
Polarity inversion for the DTR/RTS signal
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