RAM500 Memory Expansion Module
SROM
The RAM500 memory expansion module contains a single 3.3V, 256 x 8, Serial EEPROM device (AT24C02). The Serial EEPROM provides Serial Presence Detect (SPD) storage of the module memory subsystem configuration. The RAM500 SPD is software addressable by a unique address as follows: The first RAM500 attached to the host board has its SPD addressable at $AA. The second RAM500 attached to the host board has its SPD addressable at $AC. This dynamic address relocation of the RAM500 SPD shall be done using the
D
Host Clock Logic
The host board provides four SDRAM clocks to the memory expansion connector. The frequency of the RAM500 CLKS is the same as the host board.
RAM500 Module Installation
One or more RAM500 memory expansion modules can be mounted on top of the MVME5100 for additional memory capacity. To upgrade or install a RAM500 module, refer to Figure
1.Attach an ESD strap to your wrist. Attach the other end of the ESD strap to the chassis as a ground. The ESD strap must be secured to your wrist and to ground throughout the procedure.
2.Perform an operating system shutdown. Turn the AC or DC power off and remove the AC cord or DC power lines from the system. Remove the chassis or system cover(s) as necessary for access to the CompactPCI boards.
3.Carefully remove the MVME5100 from its VME card slot and lay it flat, with connectors P1 and P2 facing you.
4.Inspect the RAM500 module that is being installed on the MVME5100 host board (bottom configuration if two are being installed, top configuration if only one is being installed) to ensure
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