RAM500 Memory Expansion Module
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 D-2. RAM500 SDRAM Memory Size Options
RAM500 Memory | Device Size | Device Organization | Number of Devices |
Size |
|
|
|
|
|
|
|
32 Mbytes | 64 Mbit | 4Mx16 | 5* |
|
|
|
|
64 Mbytes | 128 Mbit | 8Mx16 | 5* |
|
|
|
|
128 Mbytes | 256 Mbit | 16Mx16 | 5* |
|
|
|
|
64 Mbytes | 64 Mbit | 8Mx8 | 9 |
|
|
|
|
128 Mbytes | 128 Mbit | 16Mx8 | 9 |
|
|
|
|
256 Mbytes | 256 Mbit | 32Mx8 | 9 |
|
|
|
|
D
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