System Features
EBX-41 Reference Manual
24
System RAM
C
OMPATIBLE
M
EMORY
M
ODULES
The Copperhead accepts two 204-pin SO-DIMM memory modules with the following
characteristics:
Size
Up to 16 GB total or 8 GB per module,
supports 1333 and 1600 MT/s
Voltage
1.35V
Type
DDR3 (VersaLogic VL-MM9 Series modules)
Clearing Non-volatile RAM (NVRAM)
You can clear NVRAM and reset the BIOS settings to factory defaults by following the
instructions below.
1.
Power off the Copperhead.
2.
Install a jumper on V1[1-2].
3.
Power on the Copperhead and wait 10 seconds or more.
4.
Power off the Copperhead.
5.
Remove the jumper from V1[1-2]. The board will not boot if you do not remove this
jumper.
6.
Power on the Copperhead.
Note:
Whenever NVRAM cleared, it is good practice to clear CMOS RAM (using Jumper V3) at
the same time.
CMOS RAM
C
LEARING
CMOS
RAM
AND
RTC
A jumper may be installed into V3[2-3] to erase the contents of the CMOS RAM and the Real-
Time Clock. When clearing CMOS RAM:
1.
Power off the Copperhead.
2.
Remove the jumper from V3[1-2], install it on V3[2-3] and leave it for four seconds.
3.
Move the jumper back to V3[1-2].
4.
Power on the Copperhead.
Note:
Whenever CMOS RAM is cleared, it is good practice to clear NVRAM (using jumper
V1[1-2]) at the same time.
Real-time Clock
The Copperhead features a battery-backed 146818-compatible real-time clock/calendar chip.
Under normal battery conditions, the clock maintains accurate timekeeping functions when the
board is powered off.
