Figure 3.1 LSI21003 Mechanical Drawing

 

J2

 

J5

 

 

 

 

 

 

 

 

Channel A

J6

Channel B

 

 

 

 

 

 

 

 

 

 

J4

A Terminators

B Terminators

Channel A

LSI53C1010

J3

J1T

Note: all dimensions in inches

•J1: PCI 32-bit, universal type board edge connector.

•J2 and J5: 68-pin high density shielded latching right-angle connector.

•J3: 50-pin high density shielded right-angle connector.

•J4: 50-pin low density shrouded vertical connector.

•J6: 4-pin low density unshrouded right-angle header.

3.1.1 Physical Characteristics

The dimensions of the LSI21003 are approximately 177.8 x 83.8 mm (7.0 x 3.3 inches). PCI connection is made through edge connector J1. The component height on the top and bottom of the LSI21003 follows the PCI specification.

Internal SCSI connections can be made in two ways:

•68-pin high density connectors J2 for Channel A or J5 for Channel B (16-bit).

•50-pin low density connector J4 for Channel A (8-bit).

External SCSI connection is made to Channel A through the 50-pin high density connector J3. Connector J3 extends through the ISA/EISA bracket.

Connector J6 connects the Busy LED. It is a 4-pin, one row, right-angle header and indicates bus activity for both Channel A and Channel B.

3-2

Technical Specifications