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3.6 Reset Generation (JP: 33, 41, 46, 48)
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. Refer to the chapter 'LIN /
UART Connectors (X5 or X9)' for DTR / RTS selection.
JP33
Selects X5 or X9 as reset source.
JP41
The signal on the DTR/RTS line can be negated with this jumper.
Remove the jumper in order to disable the RS232 reset circuit.
JP46
Selects the mode of the reset button SW6.
JP48
Open this jumper if no external Reset shall be generated.
In this case only the internal reset is active (e.g.: power-on).
Jumper
JP33
(UART RESET)
JP41
(DTR / DTRx)
JP46
(Reset imm./delayed)
JP48
(RST MCU)
By default, the external reset is enabled and set to immediate reset while the reset by UART
is disabled.
Note:
While a reset signal is asserted the red Reset-LED LD13 is lit.
During normal operation, this LED should be off!
If JP41 (DTR/DTRx) is set, the UART RESET jumper (JP33) and the according DTR/RTS
(JP23 and JP38) jumper 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.
UG-960019-11
SK-96380-120PMC User Guide
Chapter 3 Jumpers and Switches
Setting
Description
1-2
X5 (UART0) is used to generate Reset
2-3
X9 (UART2) is used to generate Reset
1-2
No polarity inversion for the DTR/RTS signal
2-3
Polarity inversion for the DTR/RTS signal
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
Table 3-5: Reset Connection
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© Fujitsu Microelectronics Europe GmbH
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