Emerson RTM-ATCA-F125, Installation And Use Instruction

Page: 34 / 62

Functional Description
RTM-ATCA-F125 Installation and Use (6806800K30C )
36
4.2.1 FRU Serial EEPROM
The RTM-ATCA-F125 provides a 128 Kb (16 K byte) I2C serial EEPROM. This is a 24LC128 type
device. The EEPROM resides at I2C address 0xA0.
This serial EEPROM is intended to hold FRU data and any additional parameters that are
required.
4.2.2 Temperature Sensors
The RTM-ATCA-F125 has provision for three temperature sensors that are located on the
primary side of the board close to the top, middle and bottom of the RTM. These sensors are
I2C-based LM75-type devices.
The over-temperature outputs from the three sensors are connected to the RTM FPGA to allow
an interrupt to the service processor to be generated in the event of an over-temperature
condition.
The I2C addresses for these devices are 0x90 (top), 0x91 (middle) and 0x92 (bottom).
4.2.3 LEDs
The RTM-ATCA-F125 provides four panel-visible LEDs that provide the standard ATCA
management LED functions:
z
RED - Out of Service
z
Green - In Service
Table 4-1 Temperature Sensor Thresholds
Sensor Non-Critical Threshold / C Critical Threshold / C
Non-recoverable
Threshold / C
Upper 58 69 80
Middle 56 65 76
Lower 54 61 72