ADLINK Technology AmITX-AL-I, Руководство пользователя

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AmITX-AL-I
Smart Embedded Management Agent (SEMA)
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5. 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 at: http://www.adlinktech.com/PD/web/PD_detail.php?cKind=&pid=1274
5.1. Board Specific SEMA Functions
5.1.1. Voltages
The BMC of the AmITX-AL 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).
Table 3: SEMA Onboard Voltage Monitor
ADC Channel Voltage Name Voltage Formula [V]
0 CPU-Vcore (MSB<<8 + LSB) x 3.3 / 1024
1 GFX-Vcore (MSB<<8 + LSB) x 3.3 / 1024
2 Vmem (MSB<<8 + LSB) x 3.3 / 1024
3 5VSB (MSB<<8 + LSB) x 1.826 x
3.3 / 1024
4 VIN(12V) (MSB<<8 + LSB) x 6.000 x
3.3 / 1024
5 5V (MSB<<8 + LSB) x 1.826 x
3.3 / 1024
6 3.3V (MSB<<8 + LSB) x 1.100 x
3.3 / 1024