Advantech PCA-6181, Manual, Page: 26 / 126

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PCA-6181 User's Manual
1.8.1 Supplementary information about DIMMs
Your PCA-6181 can accept SDRAM memory chips with or without
parity. Also note:
•
If the PCA-6181 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.
•
SDRAM chips are usually thinner and have higher pin density than
EDO chips.
•
Chips with 9 chips/side support ECC; chips with 8 chips/side do not
support ECC.
1.8 System Memory
The PCA-6181 has three sockets for 168-pin dual inline memory
modules (DIMMs). All these sockets use 3.3 V unbuffered synchro-
nous 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 1.5 GB. Use the following table to calculate the total DRAM
memory within your computer:
Table 1-6: DIMM module allocation table
Socket number 168-pin DIMM memory
1 (16, 32, 64, 128, 256 or 512 MB) x 1
2 (16, 32, 64, 128, 256 or 512 MB) x 1
3 (16, 32, 64, 128, 256 or 512 MB) X 1