Rabbit RCM3200 Manual de usuario Pagina 30

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24 RabbitCore RCM3200
The status pin is used by Dynamic C to determine whether a Rabbit microprocessor is
present. The status output has three different programmable functions:
1. It can be driven low on the first op code fetch cycle.
2. It can be driven low during an interrupt acknowledge cycle.
3. It can also serve as a general-purpose output once a program has been downloaded and
is running.
The /RESET_IN pin is an external input that is used to reset the Rabbit 3000 and the
RCM3200 onboard peripheral circuits. The serial programming port can be used to force a
hard reset on the RCM3200 by asserting the /RESET_IN signal.
Refer to the
Rabbit 3000 Microprocessor User’s Manual for more information.
4.3 Serial Programming Cable
The programming cable is used to connect the serial programming port of the RCM3200
to a PC serial COM port. The programming cable converts the RS-232 voltage levels used
by the PC serial port to the CMOS voltage levels used by the Rabbit 3000.
When the
PROG connector on the programming cable is connected to the RCM3200
serial programming port at header J3, programs can be downloaded and debugged over the
serial interface.
The DIAG connector of the programming cable may be used on header J3 of the RCM3200
with the RCM3200 operating in the Run Mode. This allows the programming port to be
used as a regular serial port.
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