Service manual

1-32 AlphaServer GS80/160/320 Service Manual
1.8.6 Hierarchical Switch Power Manager (HPM)
The hierarchical switch power manager (HPM) is a microprocessor
controlled subsystem responsible for power management,
environmental monitoring, asynchronous reset & initialize, I
2
C bus
management, and console serial bus communication for the H-switch.
Figure 1– 15 HPM Block Diagram