Temperature Monitoring And Protection - Emerson RXi2-BP Hardware Reference Manual

RXi2-BP Hardware Reference Manual
GFK-3187B
8.1.3

Temperature Monitoring and Protection

The RXi2-BP can monitor critical temperatures on-module and on-carrier and is configured to protect
itself from an overtemperature condition.
IPC peripheral circuitry provides two static thermal zones (TZE1 and TZE2) and the CPU circuitry
provides also two thermal zones (TZCP and TZD1).
The current thermal state can be always checked with the THRM LED? state.
If an overtemperature situation is present and the system shuts off, the last LED state is visible also in
S4/S5.
The following activities are implemented when conducted in an ACPI aware Operating System. Any
non-ACPI aware operating system must rely on internal hardware protection and must be evaluated
separately on a case-by-case basis.
Once the T
configuration.
Figure 26: Thermal Zones: Tactive to Thot
Temp
TZ: Active
SMB-Alert
SMBus
LED Red
OS
Note: Thermal Zone 'Active' is optional and not implemented in fanless RXi2-BP design.
Thermal Performance
threshold is exceeded, the system will try to shutdown graceful into S4, depending on OS
HOT
Thot
Tactive
Exp
Section 8
November 2020
32