Features; Acpi Power States; Embedded Controller - Hardware Monitor; Trusted Platform Module (Tpm) - Kontron COMh-sdID User Manual

3.5 Features

3.5.1 ACPI Power States

ACPI enables the system to power down, save power when not required (suspend) and wake up when
required (resume).
ACPI controls the power states S0-S5, where S0 has the highest priority and S5 the lowest priority.
S0 Working state
S1 Sleep (typically not supported anymore)
S2 Deep Sleep (typically not supported anymore)
S3 Suspend-to-RAM
S4 Suspend-to-disk / Hibernate
S5 Soft-off state
Table 22: ACPI Power States Function
Not all ACPI defined power states are available.
The COMh-sdID supports ACPI 6.0 and the power states S0, S5 only.
To power on from state S5 use
Power Button

3.5.2 Embedded Controller - Hardware Monitor

The embedded controller (EC) provides a broad set of functionality:
- monitoring the module's processor temperature, power supply voltages (VCC /5 VSB), battery
voltage V_BAT
- monitoring and configuring the on-board and external fans
- acting as hub or super-IO for low speed interfaces such as UART, I2C/SMB, GSPI, GPIO
- supporting watchdog functions
The EC is accessible through the API in the Board Support Package.

3.5.3 Trusted Platform Module (TPM)

The COMh-sdID supports a TPM chip which is directly connected to a dedicated SPI interface from the
SOC-PCH.
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