CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C
)
RAM500 Memory Expansion Module
RAM500 Module Installation
118
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 +3.3 V through this connector.
When populated, the optional RAM500 memory expansion memory blocks should appear as
Block C and Block E to the 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.
6.3
RAM500 Module Installation
Procedure
One or more RAM500 memory expansion modules must be mounted on top of the CPCI-6020
for on-board memory capability. To upgrade or install a RAM500 module, follow these steps.
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 CPCI-6020 from its CompactPCI card slot and lay it flat, with
connectors P1 through P5 facing you, or simply unpack the CPCI-6020 from its
shipping container and lay it flat as described.
4.
Inspect the RAM500 module that is being installed on the CPCI-6020 host board
(bottom configuration if two are being installed, top configuration if only one is being
installed) to ensure that standoffs are installed in the three mounting holes on the
module.
Table 6-1 RAM500 SDRAM Memory Size Options
RAM500 Memory Size
Device Size
Device Organization
Number of Devices
128 MB
256 megabit
16Mx16
5*
128 MB
128 megabit
16Mx8
9
256 MB
256 megabit
32Mx8
9
512 MB
512 megabit
64Mx8
9
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