9
2.2 Unpacking
Precautions
Some components of WAFER-C400EV SBC are very sensitive to static electric
charges and can be damaged by a sudden rush of power. To protect it from
unintended damage, be sure to note these precautions:
1. Ground yourself to remove any static charge before touching the
WAFER-C400EV SBC. You can do it by using a grounded wrist strap at all
times or by frequently touching any conducting materials that is connected
to the ground.
2. Handle WAFER-C400EV SBC by its edges. Don’t touch IC chips, leads or
circuitry if not necessary.
3. Do not plug any connector or jumper while the power is on.
2.3 System
Memory
DRAM
There is one 144-pin SO-DIMM socket to accept 3.3V non-buffered SDRAM. The
max Memory size is 512MB.
2.4
Watch-Dog Timer Setting
Reading port 443H enables the Watchdog Timer. It should be triggered before the
time-out period ends, otherwise it will assume the program operation is abnormal
and will issue a reset signal to start again. Reading port 043/843H disables the
Watchdog Timer. Please refer to Appendix A for detailed information.
2.5
Clear CMOS Setup
If the user needs to clear the CMOS setup (for example, the user forgot the
password, then the setup should be cleared and the password should be re-set).
The user should short the JP1 about 3 seconds, and then open it again. Opening
JP1 can set the system back to normal operation mode.
JP1: Clear CMOS Setup (Reserve Function)
JP1 DESCRIPTION
1-2
Normal Operation
2-3
Clear CMOS Setup
