LSI U80ALVD Manual de usuario descargar pdf (Pagina 14)

1-2 Using the LSIU80ALVD

1.2 Features

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

Interface, and Board Characteristics for the LSIU80ALVD.

1.2.1 PCI Interface

• Full 32-bit DMA bus master

• Zero wait-state bus master data bursts up to 133 Mbytes/s

(@ 33 MHz)

• Universal 3.3 V and 5 V PCI bus voltage support

• 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

1.2.2 SCSI Interface

• Supports 16-bit LVD and SE signaling

• Includes 4 Kbytes RAM for SCRIPTs instruction storage

• Automatically enables LVD or SE termination

• Contains external 68-pin high density (HD) and internal 68-pin HD

latching connectors

• Performs wide Ultra2 SCSI LVD synchronous transfers up to

80 Mbytes/s

• SCSI synchronous offset up to 31

• Provides SCSI termination power (TERMPWR) source with

autoresetting circuit protection device

• SCSI Conﬁgured AutoMatically (SCAM) Level 1 Capability

(Set “OFF” by default)

• Flash ROM for BIOS storage for up to 256 Kbytes

• Supports variable block size and scatter/gather data transfers

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LSI U80ALVD Manual de usuario Pagina 14