ADLINK PXES-2590 - Manual (Page 60)

50 Monitoring/Control Functions
Data format is as follows:
*Write 3.3V Alarm Threshold (command 0xB4)
Writes the 3.3V Alarm Threshold.
Use the SMB write word to write this word data:
Data format is as follows:
7..0 5V Under Voltage Alarm Threshold. Unsigned 8-bit data,
the LSB is 0.1%. If the 5V voltage falls below the
threshold, the MCU triggers a voltage alarm. For
example, if the under voltage threshold is set to 5%,
when the 5V is lower than 5V*0.95 (4.75V), the MCU
triggers voltage alarm. The threshold range is between 0
and 250
15..8 5V Over Voltage Alarm Threshold. Unsigned 8-bit data,
the LSB is 0.1%. If the 5V voltage is higher than this
threshold, the MCU triggers a voltage alarm. For
example, if the over voltage threshold is set to 5%, when
the 5V is higher than 5V*1.05 (5.25V), the MCU triggers
voltage alarm. The threshold range is between 0 and 250
SMB Dir Offset Value Description
Write word > 0 SA Slave address
> 1 0xB4 Command code
> 2 0-255 Low byte data
> 3 0-255 High byte data
Bit Description
7..0 3.3V Under Voltage Alarm Threshold. Unsigned 8-bit
data, the LSB is 0.1%. If the 3.3V voltage is lower than
this threshold, the MCU triggers a voltage alarm. The
threshold range is between 0 and 250
15..8 3.3V Over Voltage Alarm Threshold. Unsigned 8-bit data,
the LSB is 0.1%. If the 3.3V voltage is higher than this
threshold, the MCU triggers a voltage alarm. The
threshold range is between 0 and 250