Technical data

Functional Description

MVME2502 Installation and Use (6806800R96B)

4.13 I

C Devices

The MVME2502 utilizes two I2C ports provided by the board's processor. The I

C bus is a two-

wire, serial data (SDA) and serial clock (SCL), synchronous, multi-master bi-directional serial

bus that allows data exchange between this device and other devices such as VPD, SPD,

EEPROM, RTC, temperature sensor, RTM, XMC and IDT clocking.

The user can configure the RTM I2C adders and should be aware to avoid address duplication.

For more information on I2C bus device addressing, see I2C Bus Device Addressing on page 134.

Following are the I2C bus addresses:

Table 4-3 P2020 I2C Port1 Devices

Ref Designator I2C Device I2C 8-bit Base Address Device Type

U39 Temperature Sensor $98 ADT 7461 Temperature Sensor

U37 SPD $A0 AT24C02 (256x8)

U40 VPD EEPROM $A8 AT24C64 (8192x8)

U4 RTM $AA Reserved for RTM

U43 User EEPROM 1 $AC AT24C512 (65536x8)

U45 User EEPROM 2 $AE AT24C512 (65536x8)

U42 RTC $D0 DS 1337 real-time clock

U6 IDT Clocking Chip $DC IDT ICS9FG108

Table 4-4 P2020 I2C Port2 Devices

Ref Designator I2C Device I2C 8-bit Base Address Device Type

XJ2 XMC1 $A4 XMC dependent

Xj1 XMC2 $A6 XMC dependent