Adaptec 3940UW User's Guide download pdf (Page 15)

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Introduction

AHA-3940U/3940UW/3940UWD User’s Guide

Stock Number: 511041-00, Rev. B Page: 1-3

Print Spec Number: 494569-00

Current Date: 2/14/97 ECN Date: 2/17/97

AHA-3940U/3940UW/3940UWD host adapters include the on-

board SCSISelect

configuration utility. SCSISelect lets you change

settings such as SCSI Termination and SCSI Parity Checking without

opening the computer and physically configuring the host adapter.

SCSISelect also includes a SCSI low-level formatting utility.

PCI Bus Interface

■

Up to 132 MBytes/sec data transfer rate on the PCI bus

■

Support for PCI single- and dual-address cycles

■

PCI bus address and data parity generation

■

PCI bus master for data transfer

■

32-, 24-, 16- and 8-bit host PCI bus data transfers

PCI-to-PCI Bridges

The AHA-3940U/3940UW/3940UWD features an advanced

PCI-to-PCI Bridges design that expands PCI bus connectivity. A

separate PCI bus can improve overall system performance by off-

loading processing to local PCI buses. This reduces bus traffic and

increases system throughput.

To use the AHA-3940U/3940UW/3940UWD, your computer must

be PCI Rev. 2.1-compliant, and the motherboard BIOS must support

PCI-to-PCI Bridges. To find out whether your computer meets these

requirements, check with the system or motherboard vendor.

Data Transfer Rates

AHA-3940U

■

Up to 20.0 MBytes/sec synchronous UltraSCSI data rate per

channel

■

Up to 10.0 MBytes/sec synchronous Fast SCSI data rate per

channel

■

Up to 5.0 MBytes/sec synchronous SCSI data rate per channel

■

Up to 3.0 MBytes/sec asynchronous SCSI data rate per channel

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Adaptec 3940UW User's Guide Page 15

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