Service manual

1-76 AlphaServer GS80/160/320 Service Manual
1.19 Hierarchical Switch
The hierarchical switch allows up to eight QBBs to communicate with
each other simultaneously.
Figure 1– 34 Hierarchical Switch
A2
B2
B3
A3
A6
B6
B7
A7
A4
B4
B5
A5
A0
B0
B1
A1
System
Box 2
System
Box 4
System
Box 3
System
Box 1
PK1516
HSD
HSD
HSA
HSA
HSD
HSD
WFJ
Clock
PLLs
PLLs