I/O Device

GE Fanuc VMIPMC-5790
PMC	x86 / IA-32	v. 4.0
Markets:	networks, military and aerospace
Memory, Disk and Storage

The VMIPMC-5790 is a dual-channel Ultra160 SCSI host bus adapter (HBA) board based on the PMC form factor. The VMIPMC-5790 HBA provides two independent external Ultra160 SCSI channels that support both LVD and single-ended SCSI operations.

The VMIPMC-5790 leverages the LSI SYM53C1010 PCI dual-channel Ultra160 SCSI controller. The single-chip, true multifunction PCI device connects directly to a 64- or 32-bit, 66 or 33 MHz PMC bus. This presents one electrical load, while functioning as a single 64- or 32-bit PCI DMA bus master. The VMIPMC-5790 includes an easy-to-use on-board configuration utility, which allows the viewing and changing of default configuration settings for the host adapter and SCSI devices.

The VMIPMC-5790 dual-channel Ultra160 SCSI HBA is specicially designed for storage on workstations, servers systems, computer clustering applications and, due to its high network bandwidth, is well-suited for telecom, signal processing, and distributed computing applications.

The independent SCSI controller supports wide Ultra160 SCSI synchronous transfer rates up to 160 Mbyte/s on a low-voltage differential (LVD) SCSI bus. Integrated LVD link transceivers support both LVD and single-ended signals with no external transceivers required. Fast SCSI, Ultra SCSI, Ultra2 SCSI, and Ultra160 SCSI are all supported by the VMIPCI-5790. The 8 Kbyte of internal RAM for SCRIPTS instruction storage allow all accesses to remain internal, reducing the time spent on the PCI bus. A 944 byte DMA FIFO allows the device to efficiently burst up to 512 bytes across the PMC bus.

The VMIPMC-5790 supports cyclic redundancy checks (CRC), which is far superior for detecting errors during high-speed data transfers. CRC is a proven international standard that checks all transferred data and adds significantly to data reliability. The VMIPMC-5790 also supports domain validation, which effectively manages the connection to reduce installation problems. With domain validation, the transfer rate is actually checked at the negotiated rate—much like modems negotiating transmission speeds prior to communication. If errors are detected, the rate is stepped down until the connection becomes error-free. In this way, if a connection can be made it will be made. The highly integrated design promotes high reliability, low power consumption, and low cost.

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