Lsi 21003 Manual do Utilizador descarregar pdf (Página 12)

1-2 Using the LSI21003

1.2 Features

This section provides a high level overview of the PCI Interface, the SCSI

Interface, and Board Characteristics for the LSI21003.

1.2.1 PCI Interface

The PCI interface includes these features:

• True PCI multifunction controller for maximum performance

• 32-bit (33 MHz) DMA bus master

• Bursts up to 128 Dwords across the PCI Bus

• Zero wait-state bus master data bursts up to 110 Mbytes/s

(@ 33 MHz)

• Prefetches up to 8 Dwords of SCRIPTS™ instructions

• PCI Universal 3.3 V/5 V bus support

• Supports PCI write and invalidate, read line, and read multiple

commands

1.2.2 SCSI Interface

The SCSI interface includes these features:

• Two separate SCSI channels

• Ultra160 SCSI LVD synchronous transfers as fast as 160 Mbytes/s

(Channel B)

• Wide Ultra SCSI SE synchronous transfers as fast as

40 Mbytes/s (Channel A)

• SCSI synchronous offset up to 31

• Supports variable block size and scatter/gather data transfers

• 16-bit SE/LVD

• Four connectors:

– 50-pin high density for the external Channel A

– 50-pin narrow (ribbon) for internal Channel A

– 68-pin high density for internal Channels A and B

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Lsi 21003 Manual do Utilizador Página 12