Platform Management
Intel® Server Board SE7520AF2 TPS
160
Revision
1.2
Intel order number C77866-003
The mBMC communicates with the internal modules using its private SMBus. External devices
and sensors interact with the mBMC using the peripheral SMBus. LOM communicates through
the LOM SMBus. GPIO pins are available and are used for general input and output functions.
Dedicated LED lines are used for LED/color control.
Also built into the mBMC are the control functions for both the power supply and front panel.
Figure 38. External Interfaces to mBMC
6.2.3.1
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.
6.2.4 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 so r
D ev ice s
F ro nt P an el