Fujitsu SK-96620_350-64PMC(1) Manuel de l'utilisateur - Page 23
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4.8 Reset Generation (JP: 4, 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. Refer to the chapter 4.10.2 or
4.11 for DTR / RTS selection.
JP4
Selects X3 or X5 as reset source.
JP7
Selects the mode of the reset button
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
Selects the Reset signal polarity
Jumper
JP4
(UART RESET)
JP7
(Reset imm./delayed)
JP24
(RST MCU)
JP35
(DTR / DTRx)
Rule 6: 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 is lit.
During normal operation, this LED should be off!
If JP35 (DTR/DTRx) is set, the UART RESET jumper (JP4) and the according
DTR/RTS (JP3 and JP5) jumper have to be set, too (see chapter 4.10.2 or 4.11).
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
SK-96620_350-64PMC(1) User Guide
Chapter 4 Jumpers and Switches
SW6.
Setting
Description
X3 (UART "A") is used to generate Reset
1-2
X5 (UART "B") is used to generate Reset
2-3
Open
No UART is used to generate Reset
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 polarity inversion for the DTR/RTS signal
2-3
Polarity inversion for the DTR/RTS signal
Open
No UART is used to generate Reset
Table 4-7: Reset Connection
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