Fujitsu MOTORKIT-91F267-MC Gebruikershandleiding - Pagina 17
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Pagina afdrukken3.7 Reset generation (JP: 17, 19, 20, 23, 24)
Additionally to the internal Power-On reset, the microcontroller can be reset by an external
reset circuit (Voltage monitor) and by the UARTs DTR lines.
JP17
Selects whether UART0 or UART1 are used for reset generation
JP19
This jumper enables the reset generation by the UARTs.
JP20
This jumper can be used to bypass OC3.
JP23
This jumper connects the reset circuit to the MCU.
JP24
This jumper enables the watchdog function of the reset circuit. When it is set, the
user program has to re-trigger it periodically by toggling a port pin (P37), or else
the system is reset.
Jumper
JP17 (Reset A/B)
JP19 (DTR)
JP20 (OC3 bypass)
JP23 (Ext. Reset)
JP24 (Watchdog)
Note:
While a reset signal is asserted the red Reset LED (LD1) is lit.
During normal operation, this LED should be off.
If the reset LED stays on, check the power supply input voltage, and the above jumper
settings.
© Fujitsu Microelectronics Europe GmbH
MotorKit-91F267-MC User Guide
Setting
Description
1-2
DTR of UART1 is selected
2-3
DTR of UART0 is selected
Open
UART reset generation is disabled
Closed
UART reset generation is enabled
Open
The DTR signal is connected to the reset circuit via
OC3
Closed
The DTR signal is connected directly to the reset
circuit.
Closed
External Reset generation is active
Open
No external Reset generation
Closed
The watchdog function of U3 is enabled
Open
The watchdog function of U3 is disabled
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