ICP Electronics WAFER-5823, Руководство пользователя

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2.2 Unpacking Precautions
Some components of WAFER-5823 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:
Ground yourself to remove any static charge before touching the
WAFER-5823 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.
Handle your WAFER-5823 SBC by its edges. Don’t touch IC chips,
leads or circuitry if not necessary.
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 128MB.
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, or activate NMI to CPU. Reading port 043/843H
disables the Watchdog Timer. Refer to Appendix A for detailed
information