Emerson MVME55006E Manuel D’Utilisation

The RAM55006E memory expansion module can be used on the MVME5500 as an option for 
additional memory capability. The expansion module has two banks of SDRAM with up to 
512MB of available ECC memory. The RAM55006E incorporates a serial ROM (SROM) for 
system memory serial presence detect (SPD) data. The RAM55006E will hereafter be called 
the RAM5500.

The following table lists the features of the RAM5500 memory expansion module:

The following sections describe the physical and electrical structure of the RAM5500 memory 
expansion module.

The RAM5500 is a memory expansion module that is used on the MVME5500 single board 
computer. It is based on a single memory mezzanine board design with two banks of memory. 
Each bank is 256MB of ECC memory using 256Mb devices in 32MB x 8 device organization.

The RAM5500 provides a total added capacity of 512MB to the MVME5500. The SDRAM 
memory is controlled by the GT-64260B, which provides single-bit error correction and double-
bit error detection. ECC is calculated over 72-bits. The on-board I2C SROM contains SPD data 
for the two banks, which is used by the memory controller for configuration. Refer to the 
MVME5500 Single Board Computer Programmer’s Reference Guide (V5500A/PG) for more 
information.

The RAM5500 memory expansion module is connected to the host board with a 140-pin AMP 
4mm Free Height plug connector. This memory expansion module draws +3.3V through this 
connector.

SROM

Single 256 x 8 I2C SROM for SPD data

SDRAM

Double-bit error detect, single-bit error correct across 72 bits;
512MB mezzanine memory (two banks of 256MB memory in each) at 133 MHz