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| Emerald-MM-8P: PC/104 Module Diamond Systems Corporation has announced the availability of the Emerald-MM-8P PC/104 serial port module. Emerald-MM-8P offers 8 multi-protocol serial ports on a single PC/104 module with complete software configurability. The board is designed to work in PC/104-expandable embedded computer systems running Linux, Windows, QnX, VxWorks, and DOS. Each of the 8 serial ports on Emerald-MM-8P can be individually selected for RS-232, RS-422, or RS-485 (both local echo and no echo) under software control. I/O addresses and interrupt levels are also programmable, with interrupt sharing available for any number of ports. Each port may further be enabled or disabled in software. All configuration data is stored in an on-board EEPROM and is loaded automatically on power-up. A utility program shipped with the board can be used to configure all options and store the configuration to the EEPROM. For applications where fixed addresses are desired, four groups of preset addresses are available with jumper settings that override the programmed settings. In RS-422 and RS-485 mode, 150-Ohm termination resistors may be selected with jumpers. Emerald-MM-8P is based on the 16C654 quad serial port IC. This device contains 4 identical sets of registers, one for each port, and is compatible with the standard PC serial port. Each port contains 64-byte transmit and receive FIFOs to support high-speed data rates up to 460.8kps. Emerald-MM-8P offers 8 convenient digital I/O lines. The direction of each line is independently programmable. Two I/O headers are provided, with four serial ports and four digital I/O lines on each header. The board operates on +5V only, eliminating the need for a +12V supply that is often required for serial port operation. The board is further tested and guaranteed for reliable operation over the extended temperature range of -40 to +85C. write your comments about the article :: © 2006 Networking News :: home page |