Arria® 10 GX Transceiver Signal Integrity Development Kit User Guide
5.12.3. Temperature Sense
Temperature monitoring is done by a MAX1619 dual temperature sense device. This device allows temperature sensing of both the Arria® 10 GX FPGA die and board ambient. The MAX1619 is connected to the Arria® 10 GX FPGA by a 2-wire SMBus interface. Additionally, the OverTemp (OTn) and ALERTn signals from the MAX1619 is brought to the MAX® V device to allow it to immediately sense a temperature fault condition and turn on the Arria® 10 GX FPGA's attached fan.
An over temperature warning LED (amber-colored) is provided for the Arria® 10 GX FPGA device. This LED indicates the temperature fault condition and that the FAN should be connected and running. The fan is controlled by the OverTemp signal from the MAX1619 and can be set to turn on when the Arria® 10 GX FPGA die temperature exceeds a specified set point. Temperature fault set points can be programmed into the MAX1619. The HDL design code along with .sof/.pof files are provided to the user.