Agilex™ 7 FPGA F-Series Development Kit User Guide

ID 683024
Date 1/16/2025
Public
Document Table of Contents

A.8.3. Temperature Monitor

An 8-channel temperature sensor device, MAX6581, monitors the temperature of the Agilex™ 7 FPGA including fabric core and transceivers. Temperature monitoring of the board ambient is also done by MAX6581 with its embedded temperature sensor diode.

MAX6581 connects to the MAX® 10 system controller by a 2-wire I2C interface. Additionally, the OVERTEMPn and ALERTn signals from MAX6581 are also routed to the power MAX® 10 CPLD to allow it to immediately sense a temperature fault condition if the board gets too hot.

An over temperature warning LED (red-colored) is connected to the MAX® 10 device so software can indicate a visual over temperature warning. This LED indicates the temperature fault condition and that the fan should be running. The fan is controlled by the OVERTEMP_OUT signal from the MAX® 10 and can be controlled by software. The temperature fault set points can be programmed into MAX6581 by the I2C bus through the system MAX® 10.

Figure 26. MAX6581 Temperature Sensor Circuit