LSI 21003 - Manual (Page 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