LSI SYM22801 - Manual (Page 57)

A-1
Appendix A
Technical Specifications
This section discusses the physical environment associated with the
SYM22801 Host Adapter. It includes a mechanical drawing of this board,
which is shown in Figure A.1. It also includes these topics:
•
Section A.1, “Physical Environment,” page 1-1
•
Section A.2, “Electrical Characteristics,” page 1-2
•
Section A.3, “Operational Environment,” page 1-3
A.1 Physical Environment
This section discusses the physical, electrical, thermal, and safety
characteristics of the SYM22801 Host Adapter board. Additionally, this
board is compliant with electromagnetic standards set by the FCC.
A.1.1 Physical Characteristics
The dimensions of the SYM22801 host adapter board are 7.50” x 3.80”.
PCI connection is made through the edge connector J1. Internal 16-bit
SCSI connection is made through the 68-pin high density connectors J2
or J6. Internal 8-bit SCSI connection is made through the 50-pin low
density connectors J4 or J8. External SCSI connection is made through
the 68-pin VHDCI connectors J3 or J7. The J3 and J7 connectors
extend through the ISA/EISA bracket, which is attached to the face of
the connector outside the cabinet where the SYM22801 is installed.
The bracket is a standard ISA type with a cutout to accommodate the
connectors. The J5 and J9 connectors are for connecting the computer’s
Busy LED. It is a 4-pin one row right angle header wired in parallel with
the on-board LED. The component height on the top and bottom of the
board follows the PCI specification.