Avago Technologies LSI53C180 - Manual (Page 19)

LSI53C180 Ultra3 SCSI Bus Expander 2-1
Chapter 2
Functional
Descriptions
This chapter describes all signals, their groupings, and their functions. It
includes these topics:
•
Section 2.1, “Interface Signal Descriptions,” page 2-1
•
Section 2.2, “Internal Control Descriptions,” page 2-14
2.1 Interface Signal Descriptions
The LSI53C180 has no programmable registers, and therefore, no
software requirements. SCSI control signals control all LSI53C180
functions.
Figure 2.1 shows a block diagram of the LSI53C180 device,
which is divided into these specific areas:
•
A Side SCSI Control Block
– LVD and SE Drivers and Receivers
•
B Side SCSI Control Block
– LVD and SE Drivers and Receivers
•
Retiming Logic
•
Precision Delay Control
•
State Machine Control