RAM500 Memory Expansion Module
Table D-4. RAM500 Top Side Connector (J1)
Pin Assignments (Continued)
133 | GND | SDRAMCLK3 | 134 |
135 |
|
| 136 |
| +3.3V | ||
137 |
|
| 138 |
| SDRAMCLK4 | ||
139 |
|
| 140 |
GND* | GND* | ||
|
|
|
|
*Common GND pins mate to GIGA assemblies with ground plates.
RAM500 Programming Issues
The RAM500 contains no user programmable registers, other than the Serial Presence Detect (SPD) Data.
Serial Presence Detect (SPD) Data
This register is partially described for the RAM500 within the MVME5100 Single Board Computer Programmer’s Reference Guide. The register is accessed through the I2C interface of the Hawk ASIC on the host board (MVME5100). The RAM500 SPD is software addressable by a unique address as follows: The first RAM500 attached to the host board has has an SPD address of $AA. The second RAM500 attached to the top of the first RAM500 has an SPD address of $AC.
D
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