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MVME2500 Installation and Use (6806800L01H)
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7.4 I2C Bus Device Addressing
The following table contains the I2C devices used for the MVME2500 and its assigned device
address.
1. This is a dual address serial EEPROM.
2. The RTM Bus address can be manually changed through the S1 Switch on RTM. The default
switch configuration will set the address to 0x55. Make sure that the address is unique to
the RTM Bus address when setting the switch.
3. The address of the XMC EEPROM is configured through Geographic Address resistor on
board.
7.5 Ethernet PHY Address
The assigned Ethernet PHY on the MII management bus is shown in the following table.
Table 7-3 I2C Bus Device Addressing
I2C Bus Address Device Function Size Notes
0x50 SPD 256 x 8
0x4C ADT 7461 Temperature Sensor N/A
0x68 DS 1375 real-time clock N/A
0x54 VPD 8192 x 8 1
0x52 User configuration 65536 x 8 1
0x53 User configuration 65536 x 8 1
0x55 RTM EEPROM 8192 X 8 1, 2
0x56 XMC EEPROM N/A 3
Table 7-4 PHY Types and MII Management Bus Address
Ethernet Port Function / Location PHY Types
PHY MIIM
Address
TSEC1 Gigabit Ethernet port routed to front panel BCM54616 1