Emerald-MM-8Plus is a high performance multi-protocol serial communications board offering eight ports on a single PC/104-Plus module with complete software configurability via the operating system. Supporting baud rates up to 921.6K bps in RS-232 mode or 1.8432Mbps in RS422 or RS485 mode, each port can be individually selected for RS-232, RS-422, RS-485 or TTL level operation. Both local-echo and non-local-echo modes are supported for RS-485. Protocol selection is achieved via a jumper block for each of the eight ports. Line termination for RS-422/485 modes is also jumper-selectable.

Configuration of the Emerald-MM-8Plus is simple, using the built-in plug and play technology. For manual configuration, the base address for the board may be set in software, defining a 4K block of configuration space used to access the on-board registers. A single 32-bit read shows the detailed interrupt status for each of the eight ports. The PCI “slot” is defined through a jumper block. As with all Diamond Systems products, jumpers are paralleled with locations for zero ohm resistors to create a rugged, shock-and- vibration-resistant implementation.

Emerald-MM-8Plus is based on the Exar 17D158 octal UART IC. This device contains 8 4 identical sets of 16C55registers, one for each port, and is compatible with the standard PC serial port. Each port contains 64-byte transmit and receive FIFOs to support the high-speed data rates.

Emerald-MM-8Plus also offers 8 convenient digital I/O lines. The direction of each line is independently programmable. Diamond’s Universal Driver software provides software support for these digital I/O lines. Finally, Emerald-MM-8Plus also offers a 16-bit programmable counter / timer with a configurable clock source.

  • 8 serial ports with up to 1.8432Mbps data rates
  • Exar 17D158 octal UARTS with 64-byte FIFOs
  • Configurable for RS-232/RS-422/RS-485 protocols or simple TTL level operation
  • Plug and Play configuration
  • Supports interrupt sharing
  • EEPROM storage of configuration data for automatic power-on configuration
  • 8 programmable digital I/O lines
  • Dual 40-pin I/O headers, 4 ports per header
  • +5V only operation
  • -40°C to +85°C operation
  • PC/104-Plus form factor

DIAMOND SYSTEMS CORPORATION, founded in 1989, provides compact, rugged embedded computing solutions to customers around the world in a wide range of industries. We deliver both board-level products and system-level solutions incorporating these products. Our expertise is in analog I/O technology, high integration, customization, and rugged design. Our embedded CPU boards provide a unique level of integration by incorporating data acquisition and other features right on the board, reducing size and cost. Our analog I/O capabilities include our patented, best-in-class autocalibration technology that reduces analog measurement errors by a factor of 10 over competitors' solutions.



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