3.2.3LSI22903 Host Adapter

The LSI Logic LSI22903 PCI to Dual Channel Ultra160 SCSI Low Profile PCI Host Adapter (Figure 3.3) provides two independent Ultra160 SCSI channels. The LSI22903 board is a LPPCI board with a low profile bracket. The SCSI interface is made through connector J2 for channel A and J4 for channel B.

The LSI22903 has these features:

•Two independent Ultra160 SCSI channels

•Two connectors

–One external 68-pin VHDCI connection

–One internal 68-pin high density connection

•LVD/SE termination for external Channel A

•LVD termination for internal Channel B

Figure 3.3 LSI22903 Mechanical Drawing

J3 LED

J2

LSI53C1010

 

Channel A

 

Ultra160 SCSI LVD/SE

 

 

J1T - PCI

Note:

•J1: PCI 64-bit, universal type board edge connector.

•J2: 68-pin very high density external connector for channel A.

•J4: 68-pin high density internal connector for channel B.

•J3: 4-pin low density unshrouded right-angle LED connector.

•Subsystem Vendor ID is 1000.

•Subsystem ID is 1020.

J4 Channel B

Ultra160 SCSI LVD only

Host Adapter Characteristics

3-5