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CPCI-824 User’s Manual 2-3
Revision 1.0, January 2006
Table 2-1. SDRAM Configurations
2.4.1 Installation and Removal of Memory Modules
Installation or removal of SoDIMM memory on the CPCI-824 is a simple procedure and requires no
special tools. The CPCI-824 should be removed from the host system before changing a memory
module and care must be taken to avoid static discharge while contacting the board. A properly
connected grounding strap should be worn while installing or removing memory modules on the CPCI-
824 adapter.
Memory modules are removed by rotating the latches located on each end of the SoDIMM socket
outward, away from the module. As the latches are moved outward, the module will pop up, partially
out of the socket. Grasp the module by its edges and slide it out of the socket.
To install a memory module, first identify its proper orientation. Each module is keyed with a notch in
the card edge of the circuit board that corresponds to a tab in the socket. With the correct orientation
established, hold the module at an angle to the surface of the CPCI-824 and insert the module into the
card edge receptacle on the socket. When the module is fully inserted (the gold contacts on the module
will not be visible) press down on the high edge of the module until it snaps behind the latches.
2.5 INTERRUPTS
An Interrupt is the action in which the PPC440GX saves its old context (Machine State Register (MSR)
and next instruction address) and begins execution at a pre-determined interrupt-handler address, with a
modified MSR. Exceptions are the events that may cause the processor to take an interrupt, if the corre-
sponding interrupt type is enabled.
DDR
SDRAM
Technology
DDR SDRAM
Arrangement
#
Banks
Row Column
Total
Memory Size
128 Mbit 16M x 8 bit 1 12 10 128 Mbyte
2 12 10 256 Mbyte
8M x 16 bit 1 12 9 64 Mbyte
2 12 9 128 Mbyte
256 Mbit 32M x 8 bit 1 13 10 256 Mbyte
2 13 10 512 Mbyte
16M x 16 bit 1 13 9 128 Mbyte
2 13 9 256 Mbyte
512 Mbit 64M x 8 bit 1 13 11 512 Mbyte
2 13 11 1 Gbyte
32M x 16 bit 1 13 10 256 Mbyte
2 13 10 512 Mbyte