User guide

User Guide CC3-CAJUN • Low Power CompactPCI CPU
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Tel. [phone] • Fax. [phone] • [e-mail] • www.ekf.com
Installing or Replacing the Memory Module
Note: If you decide to replace the memory, observe the precautions in 'Before You Begin'
By default, the CC3-CAJUN comes fully equipped and tested with a 256MB/512MB SD-RAM
memory module. So normally there should be no need to install a memory module.
The CC3-CAJUN requires a PC-133 (133MHz) SDRAM SO-DIMM module independent from the
processor front side bus (100MHz ULV Celeron, 133MHz LV Pentium III). It is highly
recommended that Serial Presence Detect (SPD) SO-DIMMs be used, since this allows the chipset
to accurately configure the memory settings for optimum performance. If non-SPD memory is
installed, the BIOS will attempt to correctly configure the memory settings, but performance and
reliability may be impacted.
A replacement memory module must match the 144-pin SO-DIMM form factor (known from
Notebook PCs), 3.3V, 133MHz unbuffered, non-ECC style. Be sure to buy no module with a
height >1.250 inch (31.75mm). Suitable modules are available up to 512MB. The 815GMCH
supports modules of up to a maximum of 13 address lines (A0...A12). Memory modules
organized by more than13 address lines are not suitable.
Replacement of the Battery
When your system is turned off, a Vanadium Pentoxide Lithium rechargeable battery maintains
the current time-of-day clock and keeps the values contained in the CMOS RAM valid for a
couple of weeks. It is normal behaviour that the battery may be fully discharged, due to storage
time or after longer system down period. The battery is rechargeable approx. 1,000 times at
10% discharge depth to nominal capacity and should last during the lifetime of the CC3-CAJUN.
For replacement, the old battery must be desoldered, and the new one soldered (Panasonic
VL1220). Observe the cell polarization. We suggest that you send back the board to EKF for
battery replacement.
Warning
Danger of explosion if the battery is incorrectly replaced. Replace only with the
same or equivalent type. Do not expose a battery to fire.