20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 41

• Manufacturer Part Number: 20-101-0525
• Description: COMPUTER SINGLE-BOARD LP3500 FOX
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0525

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 3000
• Sram: 512 KB
• Flash: 512 KB
• Timers: 8 bit, 10 bit
• Number Of I/os: 26
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 3 V to 30 V
• Board Size: 93 mm x 66 mm x 11 mm
• Description/function: Computer Module
• For Use With/related Products: LP3500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1115

3.9 Serial Programming Cable
The programming cable is used to connect the LP3500’s serial programming port 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
connector on the programming cable is connected to the LP3500’s serial
PROG
programming port at header J5, programs can be downloaded and debugged over the serial
interface.
The
connector of the programming cable may be used on header J5 of the LP3500
DIAG
with the LP3500 operating in the Run Mode. This allows the programming port to be used
as a regular serial port.
3.9.1 Changing Between Program Mode and Run Mode
The LP3500 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 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
PROG
connector is not attached, the SMODE pins are pulled low,
causing the Rabbit 3000 to operate in the Run Mode. See Figure 19.
Figure 19. LP3500 Program Mode and Run Mode Set-Up
User’s Manual
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