Motorola CPCI-6020 manual RAM500 Module Installation, RAM500 Sdram Memory Size Options, 118

RAM500 Memory Expansion Module RAM500 Module Installation

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.

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

6.3RAM500 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.

118 CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)