Board Specific Sema Functions; Table 7: Sema Onboard Voltage Monitor; Table 8: Sema Bmc Status - ADLINK Technology Express-KL2 User Manual

5.1.

Board Specific SEMA Functions

5.1.1. Voltages
The BMC of the Express-KL2 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
8
9
5.1.2. Main Current
The BMC of the Express-KL2 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-KL2.
38
Voltage Name
VCORE
VGFX
VMEM
5VSB
RTC
VIN
5V
3.3V
3.3VSB
(MAIN CURRENT)

Table 7: SEMA Onboard Voltage Monitor

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

Table 8: SEMA BMC Status

Voltage Formula [V]
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 1.826 x 3.3 / 1024
(MSB<<8 + LSB) x 3.3 / 1024
(MSB<<8 + LSB) x 6.000 x 3.3 / 1024
(MSB<<8 + LSB) x 1.826 x 3.3 / 1024
(MSB<<8 + LSB) x 1.100 x 3.3 / 1024
(MSB<<8 + LSB) x 1.100 x 3.3 / 1024
Use Main Current Function
Smart Embedded Management Agent (SEMA)