Digi ConnectCore System-on-Modules Single Board Computers Development kits

RabbitCore® RCM3900 Series


Microprocessor Core Module

  • Rabbit® 3000 microprocessor at 44 MHz
  • Extended operating temperature range: -20° C to +80° C
  • 10/100Base-T Ethernet
  • Up to 1 GB microSD hot-swappable storage

The RabbitCore® RCM3900 module series delivers 10/100Base-T Ethernet and -20°C to +85°C extended temperature range. The RCM3900 series offers two variations, one with on-board 32MB of flash memory mass storage, and the other version without it. Both variations deliver the capability to use up to 1 GB of hot-swappable mass storage with miniSD™ memory cards, ideal for embedded applications using data archiving for later uplink to a computer.

Applications that can use the mass storage and Ethernet capability of the RabbitCore RCM3900 module are:

  • Data archiving and upload
  • Tank monitoring
  • Automatic meter reading
  • Remote energy management
  • Security and surveillance

The RCM3900’s mass-storage can use the Dynamic C software FAT file system module to store data and use the same directory file structure commonly used on PCs.

RabbitCores mount directly onto a user-designed motherboard and act as the controlling microprocessor for the system. Its compact size - 1.85" x 2.73" x 0.86" (47 mm x 69 mm x 22 mm) – makes it easy to integrate the RCM3900 module onto a motherboard. The RCM3900 has fast program execution SRAM and data SRAM, flash memory, and the circuitry necessary for reset and management of battery backup of the Rabbit 3000’s internal real-time clock and the data SRAM. Two 34-pin headers bring out the Rabbit 3000 I/O bus lines, parallel ports, and serial ports.

Developing with RabbitCores

The RabbitCore family of microprocessor core modules is designed to facilitate rapid development and implementation of embedded systems. Develop programs with our industry-proven Dynamic C® development system, a C-language environment that includes an editor, compiler, and in-circuit debugger.

Download the program from your PC via USB or serial port, and debug right on the target hardware – no in-circuit emulation is required. This environment reduces effort and speeds hardware and software integration. Rabbit provides an extensive library of drivers and sample programs, along with royalty-free TCP/IP stack with source.

A Development Kit provides the essentials that you need to design your own microprocessor-based system, and includes a complete Dynamic C software development system. The Development Kits also contains a Prototyping Board that will allow you to evaluate the RCM3900 module and to prototype circuits that interface to the module. You will also be able to write and test software for the RCM3900 modules.

Specifications RCM3900 RCM3910
Microprocessor Rabbit® 3000 @ 44 MHz
EMI Reduction Spectrum spreader for reduced EMI (radiated emissions)
Ethernet Port 10/100Base-T, RJ-45, 3 LEDs
SRAM 512K program (fast SRAM) + 512K data
Flash Memory (Program) 512K
Memory (Data Storage) 32 MB (fixed NAND flash)
+ 128 MB – 1 GB microSD™ Card
128 MB – 1 GB microSD Card
LED Indicators LINK/ACT (link/activity)
FDX/COL (full-duplex/ collisions)
SPEED (on for 100Base-T Ethernet connection)
CE/BSY (NAND flash enabled/user –programable)
Backup Battery Connection for user-supplied backup battery (to support RTC and data SRAM)
General Purpose I/O 52 parallel digital I/O lines:
  • 44 configurable I/O
  • 4 fixed inputs
  • 4 fixed outputs
Additional Inputs Startup mode (2), reset in
Additional Outputs Status, reset out
External I/O Bus Can be configured for 8 lines and 5 address lines (shared with parallel I/O lines)
Serial Ports Five 3.3V, CMOS-compatible ports(shared with I/O)
  • All 5 configurable as asynchronous (with IrDA)
  • 3 configurable as clocked serial (SPI)
  • 2 configurable as SDL/HDLC
  • 1 asynchronous serial port dedicated programming
Serial Rate Maximum asynchronous baud rate = CLK/8
Slave Interface A slave port allows the RCM3900/RCM3910 to be used as an intelligent peripheral device slaved to a master processor, which may either be another Rabbit 3000 or any other type of processor
Real-Time Clock Yes
Timers Ten 8-bit timers (6 cascadable, 3 reserved for internal peripherals, one 10-bit timer with 2 match registers
Watchdog/Supervisor Yes
Pulse/Width Modulators 4 PWM registers with 10-bit free-running counter and priority interrupts
Input Capture 2-channel input capture can be used to time input signals from various port pins
Quadrature Decoder 2-channel quadrature decoder accepts inputs from external incremental encoder modules
Power 3.15-3.45 V DC 325 mA @ 44.2 MHz, 3.3 V
Operating Temperature 0° C to 70° C
Humidity 5% to 95%, non-condensing
Connectors Two 2 x 17, 2 mm pitch
One microSD Card socket
Board Size 1.850” x 2.725” x 0.86” (47 mm x 69 mm x 22 mm)
Product Warranty 1 year

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