Datasheet 185
Functional Description
5.14.2.2 Advanced TCO Mode
The PCH supports the Advanced TCO mode in which SMLink0 and SMLink1 are used in
addition to the host SMBus. See Figure 5-6 for more details. In this mode, the Intel ME
SMBus controllers must be enabled by soft strap in the flash descriptor.
SMLink0 is dedicated to integrated LAN use and when an Intel PHY 82579 is connected
to SMLink0, a soft strap must be set to indicate that the PHY is connected to SMLink0.
The interface will be running at the frequency of 300 kHz - 400 kHz depending on
different factors such as board routing or bus loading when the Fast Mode is enabled
using a soft strap.
SMLink1 is dedicated to Embedded Controller (EC) or Baseboard Management
Controller (BMC) use. In the case where a BMC is connected to SMLink1, the BMC
communicates with Management Engine through Intel ME SMBus connected to
SMLink1. The host and TCO slave communicated with BMC through SMBus.
Figure 5-6. Advanced TCO Mode
Host SMBus
TCO Slave
SPD
(Slave)
Legacy Sensors
(Master or Slave
with ALERT)
Advanced TCO Mode
SMBus
SMLink0
Intel ME SMBus
Controller 3
EC or
BMC
Intel
82579
SMLink1
PCH
Intel ME SMBus
Controller 2
Intel ME SMBus
Controller 1
PCI/PCIe*
Device
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