Datasheet

Functional Description
114 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
3.13.2 TCO Modes
3.13.2.1 TCO Legacy / Compatible Mode
In TCO Legacy/Compatible mode, only the host SMBus is used. The TCO Slave is
connected to the host SMBus internally by default. In this mode, the Intel ME SMBus
controllers are not used and should be disabled by soft strap.
In TCO Legacy/Compatible mode Intel® Xeon® Processor D-1500 Product Family can
function directly with an external LAN controller or equivalent external LAN controller to
report messages to a network management console without the aid of the system
processor. This is crucial in cases where the processor is malfunctioning or cannot
function due to being in a low-power state. Tab le 3- 3 6 includes a list of events that will
report messages to the network management console.
Note: The GPIO11/SMBALERT# pin will trigger an event message (when enabled by the
GPIO11_ALERT_DISABLE bit) regardless of whether it is configured as a GPI or not.
Figure 3-6. TCO Legacy/Compatible Mode SMBus Configuration
Host SMBus
TCO Slave
SPD
(Slave)
uCtrl
Legacy Sensors
(Master or Slave
with ALERT)
TCO Legacy/Compatible Mode
SMBus
X
Intel ME SMBus
Controller 3
X
X
PCI/PCIe*
Device
3
rd
Party
NIC
Intel Xeon Processor D-
1500 Product Family
Intel ME SMBus
Controller 1
Intel ME SMBus
Controller 2
Table 3-36. Event Transitions that Cause Messages
Event Assertion? De-assertion? Comments
INTRUDER# pin Yes No Must be in “S1 or hung S0” state
THRM# pin Yes Yes Must be in “S1 or hung S0” state. The THRM# pin
is isolated when the core power is off, thus
preventing this event in S4–S5.
Watchdog Timer
Expired
Yes No (NA) “S1 or hung S0” state entered
GPIO[11]/
SMBALERT# pin
Yes Yes Must be in “S1 or hung S0” state
CPU_PWR_FLR Yes No “S1 or hung S0” state entered