LSI SYM8953U manual Features, PCI Interface, Scsi Interface

the actions of the SCSI and DMA cores. The SCRIPTS processor executes complex SCSI bus sequences independently of the host CPU. For more information on the SCSI SCRIPTS Instruction Set used to write these algorithms, refer to the Symbios SYM53C895A PCI to Ultra2 SCSI Controller Technical Manual.

This user’s guide, along with the Symbios PCI SCSI Device Management System SDMS 4.0 User’s Guide, contains a complete library of product information and installation instructions. With this information, the full benefits of your SYM8953U PCI to Ultra2 SCSI Host Adapter are available to you.

1.2 Features

This section provides a high-level overview of the PCI Interface, the SCSI Interface, and Board Characteristics for the SYM8953U Host Adapter board.

1.2.1PCI Interface

•Supports 32-bit DMA bus master with 64-bit addressing

•Bursts up to 133 Mbytes/s (@ 33 MHz) with zero wait-state bus master data

•Supports universal 3.3 V and 5 V PCI bus voltage

•Supports 32-bit 33 MHz data bursts with variable burst lengths

•Bursts 2 to 128 dwords across the PCI bus

•Prefetches up to 8 dwords of SCRIPTS instructions

•Supports PCI Write and Invalidate, Read Line, and Read Multiple commands

1.2.2SCSI Interface

•Supports 16-bit LVD and SE signaling

•Supports SCRIPTS

– Includes 8 Kbytes RAM for SCRIPTS instruction storage

•Automatically enables LVD or SE termination

1-2 Using the SYM8953U Host Adapter