ICP 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, please be sure to
pay attention to these following precautions:
1. 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.
2. Handle your WAFER-5823 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 that supports 3.3V
non-buffered SDRAM. Maximum 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. Refer to Appendix A for detailed information