Ram500 Description; Table 5-2. Ram500 Sdram Memory Size Options - Emerson MVME51005E Installation And Use Manual

5 RAM500 Memory Expansion Module

RAM500 Description

The RAM500 is a memory expansion module that is used on the MVME5100 Single Board
Computer. The RAM500 is based on a single memory mezzanine board design with the
flexibility of being populated with different sized SDRAM components and SPD options to
provide a variety of memory configurations. The design of the RAM500 allows any memory size
module to connect to and operate with any other available memory size module.
The optional RAM500 memory expansion module is currently available in three sizes: 128MB,
256MB, and 512MB, with a total added capacity of 1GB. The SDRAM memory is controlled by
the Hawk ASIC, which provides single-bit error correction and double-bit error detection. ECC
is calculated over 72-bits. Refer to the MVME5100 Single Board Computer Programmer's
Reference Guide (V5100A/PG) for more information.
The RAM500 consists of a single bank/block of memory. The memory block size is dependent
upon the SDRAM devices installed. Refer to
The RAM500 memory expansion module is connected to the host board with a 140-pin AMP
0.6mm Free Height plug connector. If the expansion module is designed to accommodate
another RAM500 module, the bottom expansion module will have two 140-pin AMP connectors
installed: one on the bottom side of the module, and one on the top side of the module. The
RAM500 memory expansion module draws +3.3V through this connector.
When populated, the optional RAM500 memory expansion memory blocks should appear as
Block C and Block E to the Hawk ASIC. Block C and E are used because each of the module's
SPD is defined to correspond to two banks of memory each: C and D for the first SPD and E
and F for the second SPD.
The RAM500 SPD uses the SPD JEDEC standard definition and is accessed at address $AA
or $AC. Refer to the following section on SROM for more details.

Table 5-2. RAM500 SDRAM Memory Size Options

RAM500 Memory
Size
32 Mbytes
64 Mbytes
128 Mbytes
64 Mbytes
128 Mbytes
256 Mbytes
44
MVME51005E Single Board Computer Installation and Use (6806800A38B)
Table 5-2
Device Size
Organization
64 Mbit
128 Mbit
256 Mbit 16Mx16
64 Mbit
128 Mbit
256 Mbit
for memory options.
Device Number of
Devices
4Mx16
8Mx16
8Mx8
16Mx8
32Mx8
5*
5*
5*
9
9
9