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4/ Features and Interfaces
4.1. ACPI Suspend Modes and Resume Events
The COMe-bID7 supports the S-states S0 and S5.
The following event resumes the system from S5:
Power Button
Wake-on-LAN
4.2. Real Time Clock (RTC)
The RTC keeps track of the current time accurately. The RTC's low power consumption enables the RTC to continue
operation and keep time using a lower secondary source of power while the primary source of power is switched off
or unavailable.
The COMe-bID7 supports typical RTC values of 3 V and less than 10 μA. When powered by the mains power supply on-
module regulators generate the RTC voltage, to reduce RTC current draw. The RTC's battery voltage range is 2.8 V to
3.47 V.
It is not recommended to run a system without a RTC battery on the carrier board. Even if the
RTC battery is not required to keep the actual time and date when main power is off, a
missing RTC battery will cause other side effects such as longer boot times. Intel processor
environments are generally designed to rely on RTC battery voltage.
4.3. NVMe Storage (Option)
The NVMe SSD Flash memory supports up to one TByte. The optional NVMe SSD uses HSIO #18 of the SoC.
4.4. Hardware Monitor (HWM)
The Hardware Monitor (HWM) controls the health of the system by monitoring critical aspects such as temperatures,
power supply voltages and fan speed for cooling. The temperature is controlled by temperature sensors supported
via the SMBus interface and directly from the CPU using Intel's® Platform Environment Control Interface (PECI) 3.0
interface. The SMART FAN™ technology controls the duty cycle of the fan output with temperature setting points.
This enables flexible fan control for cooling solutions and noise sensitive solutions. For system protection, users can
set threshold values for alarm signals.
4.5. Trusted Platform Module (TPM)
A Trusted Platform Module (TPM) stores RSA encryption keys specific to the host system for hardware
authentication. The term TPM refers to the set of specifications applicable to TPM chips. The LPC bus connects the
TPM chip to the CPU.
Each TPM chip contains an RSA key pair called the Endorsement Key (EK). The pair is maintained inside the chip and
cannot be accessed by software. The Storage Root Key (SRK) is created when a user or administrator takes ownership
of the system. The TPM generates the key pair based on the Endorsement Key and an owner-specified password.
A second key, called an Attestation Identity Key (AIK) protects the device against unauthorized firmware and software
modification by hashing critical sections of firmware and software before they are executed. When the system
attempts to connect to the network, the hashes are sent to a server that verifies that they match the expected values.
If any of the hashed components have been modified since the last start, the match fails, and the system cannot gain
entry to the network.
www.kontron.com
COMe-bID7 User Guide Rev. 1.2
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