
Platform Management ArchitectureIntel® Server Board SE7520BD2 Technical Product Specification
86
Revision
1.3
Figure 12. External Interfaces to mBMC
4.2.4.1
Private Management I
2
C Buses
The mBMC implements a single private management bus. The mBMC is the sole master on this
bus. External agents must use the mBMC
Master Write/Read I
2
C
command if they require direct
communication with a device on this bus. In addition, the mBMC provides a
Reserve Device
command that gives an external agent exclusive access to a specific device for a selectable
time.
4.2.5 Messaging
Interfaces
This section describes the supported mBMC communication interfaces:
•
Host SMS interface via SMBus interface
•
LAN interface using the LAN On Motherboard SMBus
P C I
S M B u s
S M B u s
S e n s o r
D e v ic e s
F ro n t P a n e l