7 sema (smart embedded management agent), Sema (smart embedded management agent) – ADLINK ETX-BT User Manual

Page 38

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7 SEMA (Smart Embedded Management Agent)

The onboard microcontroller (BMC) implements power sequencing and Smart Embedded
Management Agent (SEMA) functionality.

The microcontroller communicates via the System Management Bus with the CPU/chipset. The
following functions are implemented.

X

Total operating hours counter. Counts the number of hours the module has been run in
minutes.

X

On-time minutes counter. Counts the seconds since last system start.

X

Temperature monitoring of CPU and board temperature. Minimum and maximum
temperature values of CPU and board are stored in flash.

X

Power cycles counter

X

Boot counter. Counts the number of boot attempts.

X

Watchdog Timer (Type-II). Set, Reset, Disable Watchdog Timer. Features auto-reload at
power-up.

X

System Restart Cause. Power loss, BIOS Fail, Watchdog, Internal Reset, External Reset

X

Fail-safe BIOS support. In case of a boot failure, hardware signals tell external logic to boot
from fail-safe BIOS.

X

Flash area. 1kB Flash area for customer data

X

128 Bytes Protected Flash area. Keys, IDs, etc. can be stored in a write- and clear-
protectable region.

X

Board Identifiers. Vendor, Board, Serial number, Production Date

X

Main-current & voltage. Monitors drawn current and main voltages

For a detailed description of SEMA features and functionality, please refer to the SEMA
Technical Manual
and SEMA Software Manual, downloadable at:

http://www.adlinktech.com/PD/web/PD_detail.php?cKind=&pid=1274

Note: Due to limitations of the Intel “Bay Trail” platform, SEMA can only obtain CPU temperature
readings when the OS is running.

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