Table 10. LEDs on the T2080RDB-PC front plate
LEDs Used for Controlled by
D12 Power on +3.3 V rail
D4 SFP1_LED0 CPLD
D5 SFP1_LED1 CPLD
D6 SFP2_LED0 CPLD
D7 SFP2_LED1 CPLD
2.17 Temperature
The T2080 has a thermal diode attached to the die, allowing direct temperature measurement. These pins are connected to an
ADT7481 3 channel thermal monitor. One channel monitors the T2080 and another channel monitors the C29x, which allows
direct reading of the temperature of the die and is accurate to ±1 °C. The third channel of the ADT7481 measures the ambient
(board) temperature.
The ADT7481 temperature warning and alarm signals are connected to the CPLD for monitoring. CPLD uses these signals to
adjust CPU FAN speed and protect the CPU from over-temperature failure.
NXP Semiconductors
Architecture
QorIQ T2080 Reference Design Board (T2080RDB-PC) User Guide, Rev. 1, 08/2021
User Guide 26 / 44
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