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aTCA-80302PA/PD
8.1 Shelf Managers
This Chapter describes the Shelf Manager hardware. For explicit software
documentation see:
• Pigeon Point Shelf Manager User Guide
• Pigeon Point Shelf Manager External Interface Reference
8.2 Introduction
The Shelf Manager is a 78 mm x 280 mm board that fits into a dedicated Shelf
Manager slot in a ATCA Shelf.
The Shelf Manager has two main responsibilities:
1 Manage/track the FRU population and common infrastructure of a Shelf,
especially the power, cooling and interconnect resources and their usage.
2 Enable the overall System Manager to join in that management/tracking through
the System Manager Interface, which is typically implemented over Ethernet.
The Shelf management is based on the Pigeon Point Shelf management solution
for AdvancedTCA products. The Shelf management software executes on the
Pigeon Point
Sh
elf
M
anagement
M
ezzanine 700 (
ShMM-700
), a compact SO-
DIMM form-factor module, installed on the carrier board.
The carrier board includes several on-board devices that enable different aspects
of Shelf management based on the ShMM-500. These facilities include I²C-based
hardware monitoring/control and GPIO expander devices.
The Shelf Manager provides the Fan Controller for up to 9 fans and individual
Ethernet connections to both Base Hubs (ShMC cross connect).
The Shelf Manager also provides an IPMB interface for the non-intelligent FRUs in
a Shelf. The Shelf Manager communicates with the non-intelligent FRUs over I²C
busses and expose the sensors for these FRUs at IPMB address 0x20.
To maximize availability, the ATCA Shelves are designed to work with two
redundant ShMM-Shelf Managers.
