Artesyn MVME3100 Single Board Computer Installation and Use (June 2014) - Manual (Page 131)

Programming Details
MVME3100 Single Board Computer Installation and Use (6806800M28E) 131
7.5 Two-Wire Serial Interface
A two-wire serial interface for the MVME3100 is provided by an I 2 C compatible serial controller
integrated into the MPC8540. The MPC8540 I 2 C controller is used by the system software to
read the contents of the various I
2
C devices located on the MVME3100. The following table
contains the I
2
C devices used for the MVME3100 and their assigned device addresses.
Table 7-4 I2C Bus Device Addressing
I2C Bus
Address
Device Address
A2 A1 A0
(binary)
Size (bytes) Device Function Notes
$90 000 N/A DS1621 temperature sensor
$A0 000 256 x 8 DDR memory SPD (SODIMM module
banks 1 and 2 corresponding to
MPC8540 memory controller chip
selects 0 and 1)
1
$A2 001 Reserved
$A4 010 65,536 x 8 User configuration 2
$A6 011 65,536 x 8 User configuration 2
$A8 100 8192 x 8 VPD (on-board system configuration) 2
$AA 101 8192 x 8 RTM VPD (off-board configuration) 2 , 3
$AC 110 Reserved
$AE 111 Reserved
$D0 N/A N/A DS1375 real-time clock
1. Each SPD defines the physical attributes of each bank or group of banks. If both banks of a SODIMM are populated they
are the same speed and memory size.
2. This is a dual address serial EEPROM.
3. The device address is user selectable using switches on the RTM. The recommended address setting for the MVME3100
is $AA.