RadiSys EPC-2102 P5000HX2 Series, Руководство по обслуживанию, Страница: 42 / 44

EPC-2102 Single-Board Computer
32 Service Manual
Installing Memory
Overview
The EPC-2102 supports up to 256 MB of on-board dynamic RAM modules in Parity/FPM or
Non-Parity, ECC, or up to 128 MB EDO.
Memory Bank
The EPC-2102 contains four 72-pin SIMM sockets for DRAM memory modules ( Figure 12 ).
These four sockets comprise two memory banks, each consisting of two sockets and providing
a 64-bit wide data path and 8 parity bits (x36 SIMMs only):
•
Sockets 1 and 2 comprise Bank 0
•
Sockets 3 and 4 comprise Bank 1
Each bank must be completely filled to be operable. Also, both sockets in a bank must be filled
with SIMMs of identical size. For example, if an 16MB SIMM is installed in Socket 1, another
16MB SIMM must be installed in Socket 2.
SIMM Types
Five SIMM memory sizes (4, 8, 16, 32, and 64 MB) are supported. SIMMs of these sizes can
be installed in sockets 1, 2, 3, or 4 in combinations as illustrated in
Table 12 .
Memory size is detected by the system BIOS. Memory timing requires 70 ns or faster page
devices. Parity generation and checking is provided for each byte.
Figure 12. Memory Combinations
The SIMM sockets are gold and require gold SIMMs. Use of tin/lead SIMMs
can cause damage to the equipment and could void the warranty.
!
To avoid damage or injury, always power-off the system and disconnect all
power cords from their power source before handling the equipment.
To help prevent accidental damage that can be caused by static discharge,
always use a grounding wrist strap or other static-dissipating device when
accessing the interior of the chassis and handling the equipment.
!
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