Board Specific Sema Functions - ADLINK Technology COM Express Express-HLE User Manual

5.1 Board Specific SEMA Functions

5.1.1 Voltages
The BMC of the Express-HLE 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).
ADC Channel
0
1
2
3
4
5
6
7
5.1.2 Main Current
The BMC of the Express-HLE implements a current monitor. The current can be read by calling the SEMA function "Get Main Current". The
function returns four 16-bit values divided in high-byte (MSB) and low-byte (LSB). These 4 values represent the last 4 currents drawn by the
board. The values are sampled every 250ms. The order of the 4 values is NOT in chronological order. Access by the BMC may increase the
drawn current of the whole system. In this case, there are still 3 samples not influenced by the read access.
5.1.3 BMC Status
This register shows the status of BMC controlled signals on the Express-HL.
Express-HLE
Voltage Name
---
+V3.3S
+V1.05S
+V3.3A
+VDDQ (V1.35 ~ V1.5)
+V5A_DUAL
+VIN
(MAIN CURRENT)
Main Current = (MSB_n<<8 + LSB_n) x 8.06mA
Status Bit Signal
0 WDT_OUT
1 LVDS_VDDEN
2 LVDS_BKLTEN
3 BIOS_MODE
4 POSTWDT_DISn
5 SEL_BIOS
6 BIOS_DIS0n
7 BIOS_DIS1n
Voltage Formula [V]
---
(MSB<<8 + LSB) x 1.100 x 3.3 / 1024
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 1.100 x 3.3 / 1024
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 1.833 x 3.3 / 1024
(MSB<<8 + LSB) x 6.000 x 3.3 / 1024
Use Main Current Function
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