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3145 -- Ultra2 Fast/Wide SCSI
Last updated: March 10, 2005
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- Manufacturer:
- Technobox, Inc.
- Product Description:
- The 3145 ULTRA2 SCSI PMC provides a single-ended or low-voltage differential interface between a PCI-bus host board and a SCSI device via a 53C895 SCSI controller. Both front and rear I/O are supported. The front panel interface is a 68-pin connector recommended by the ANSI X3.13. Rear I/O is supported through the board´s PN4 connector. An active termination network for each SCSI signal line terminates the SCSI bus. A DIP switch on the 3145 allows the user to selectively enable or disable termination. This design supports independent selectable termination for the upper and lower SCSI bus bytes.
The 53C895 SCSI controller features an intelligent processing engine which executes scripts to reduce processor overhead. Support is provided for 1-byte and 2-byte wide SCSI buses (2-byte = "Wide") operating in either asynchronous or synchronous (i.e., "Fast") protocol. In Single Ended mode (SE), Fast/Wide operation provides 40 MB/s throughput. In Low Voltage Differential (LVD), 80 MB/s throughput can be achieved.
Selection of either SE or LVD mode is accomplished automatically in the hardware design. The SCSI PMC adapter provides termination power through a Schottky diode as is typically done in most SCSI implementations. A self-resetting fuse will automatically shut off when excessive termination current is supplied to the SCSI bus. The fuse will automatically re-power the SCSI interface following removal of the offending short circuit.
Several LEDS that are visible from the side of the PMC indicate SCSI bus activity. This 3145 also supports the Bootstrap FLASH memory option (128K bytes), whereby users can store boot-up code on the 3145.<BR>3.3V or 5V PCI signaling.
- OSes supported:
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- URL to the product/service/project description on company's website:
- http://www.technobox.com/cat3145.pdf
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