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1.8
System Memory
The PCA-6004 has two 168-pin dual inline memory module sockets
(DIMMs). All these sockets use 3.3 V unbuffered synchronous
DRAMs (SDRAM). DIMMs are available in capacities of 16, 32, 64,
128, 256 or 512 MB. The sockets can be filled in any combination with
DIMMs of any size, giving a total memory size between 16 MB and 1
GB. Use the following table to calculate the total DRAM memory
within your computer:
Table 1-5: DIMM module allocation table
Socket number
1.8.1 Sample calculation: DIMM memory capacity
Suppose you install a 128 MB DIMM into your PCA-6004's socket 1
and a 32 MB DIMM into sockets. Your total system memory is 160
MB, calculated as follows:
Table 1-6: DIMM memory capacity sample calculation
Socket number
1
2
Total memory
1.8.2 Supplementary information about DIMMs
Your PCA-6004 can accept SDRAM memory chips with or without
parity. Also note::
•
If the PCA-6004 operates at 133/100 MHz, only use PC-133/ PC-100
compliant DIMMs. Most systems will not even boot if non-compli-
ant modules are used. This is due to strict timing issues involved at
this speed.
1
2
168-pin
128 MB
32 MB
168-pin DIMM memory
(16, 32, 64, 128, 256 or 512 MB) x 1
(16, 32, 64, 128, 256 or 512 MB) x 1
DIMM memory
x 1
x 1
Chapter 1 Hardware Configuration
Total memory
128 MB
32 MB
160 MB
11
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