Smart Embedded Management Agent (Sema); Board Specific Sema Functions; Table 3: Sema Onboard Voltage Monitor - ADLINK Technology AmITX-CF-G User Manual

6. Smart Embedded Management Agent (SEMA)

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.
• Total operating hours counter. Counts the number of hours the module has been run in minutes.
• On-time minutes counter. Counts the seconds since last system start.
• Temperature monitoring of CPU and board temperature. Minimum and maximum temperature values of CPU
and board are stored in flash.
• Power cycles counter
• Boot counter. Counts the number of boot attempts.
• Watchdog Timer (Type-II). Set / Reset / Disable Watchdog Timer. Features auto-reload at power-up.
• System Restart Cause. Power loss / BIOS Fail / Watchdog / Internal Reset / External Reset
• Fail-safe BIOS support. In case of a boot failure, hardware signals tell external logic to boot from fail-safe
BIOS.
• Flash area. 1kB Flash area for customer data
• 128 Bytes Protected Flash area. Keys, IDs, etc. can be stored in a write- and clear-protectable region.
• Board Identify. Vendor / Board / Serial number / Production Date
• 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 on the ADLINK web site: www.adlinktech.com.
6.1.

Board Specific SEMA Functions

6.1.1. Voltages
The BMC implements a voltage monitor and samples several onboard voltages. The voltages can be read by
calling the SEMA function "Get Voltages". The function returns a 16-bit value divided into high-byte (MSB) and low-
byte (LSB).
Smart Embedded Management Agent (SEMA)

Table 3: SEMA Onboard Voltage Monitor

ADC Voltage Name
Channel
0 N/A
1 VIN
2 5VSB
3 RTC
AmITX-CF-G
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