20-101-1139 Rabbit Semiconductor, 20-101-1139 Datasheet - Page 39

• Manufacturer Part Number: 20-101-1139
• Description: RCM4310 RABBITCORE
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1139

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Core Processor: Rabbit 4000
• Clock Speed: 58.98 MHz
• Interface Type: Ethernet
• Flash: 1 MByte
• Timers: 10 x 8 bit
• Operating Supply Voltage: 3.3 V
• Board Size: 72 mm x 47 mm x 21 mm
• For Use With/related Products: RCM4310
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1142

4.3 Programming Cable
The programming cable is used to connect the programming port of the RCM4300 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 4000.
When the
PROG
connector on the programming cable is connected to the programming
port on the RCM4300, programs can be downloaded and debugged over the serial interface.
4.3.1 Changing Between Program Mode and Run Mode
The RCM4300 is automatically in Program Mode when the
connector on the pro-
PROG
gramming cable is attached, and is automatically in Run Mode when no programming
cable is attached. When the Rabbit 4000 is reset, the operating mode is determined by the
state of the SMODE pins. When the programming cable’s
connector is attached,
PROG
both the SMODE pins are pulled high, placing the Rabbit 4000 in the Program Mode.
When the programming cable’s
connector is not attached, the SMODE0 pin is
PROG
pulled low and the SMODE1 pin is high so that the Rabbit 4000 powers up in the clocked
serial bootstrap mode to load the program from the serial flash when the RCM4300 is
operating in the Run Mode.
Figure 9. Switching Between Program Mode and Run Mode
RabbitCore RCM4300 User’s Manual
39