101-0522 Rabbit Semiconductor, 101-0522 Datasheet - Page 36

• Manufacturer Part Number: 101-0522
• Description: MODULE RABBITCORE RCM3220
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0522

• Module/board Type: MPU Core Module
• For Use With/related Products: RCM3220
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 101-522; 101-522

4.3 Serial Programming Cable
The programming cable is used to connect the programming port of the RCM3700 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 RCM3700 pro-
gramming port, programs can be downloaded and debugged over the serial interface.
The
DIAG
connector of the programming cable may be used on header J2 of the RCM3700
with the RCM3700 operating in the Run Mode. This allows the programming port to be
used as a regular serial port.
4.3.1 Changing Between Program Mode and Run Mode
The RCM3700 is automatically in Program Mode when the
PROG
connector on the pro-
gramming cable is attached, and is automatically in Run Mode when no programming
cable is attached. When the Rabbit 3000 is reset, the operating mode is determined by the
state of the SMODE pins. When the programming cable’s
connector is attached,
PROG
the SMODE pins are pulled high, placing the Rabbit 3000 in the Program Mode. When the
programming cable’s
connector is not attached, the SMODE pins are pulled low,
PROG
causing the Rabbit 3000 to operate in the Run Mode.
Figure 9. Switching Between Program Mode and Run Mode
RabbitCore RCM3700 User’s Manual
34