ICP Electronics ROCKY-512, Руководство пользователя

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2.2 Unpacking Precautions
Some components of ROCKY-512 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 following
precautions:
z
Ground yourself to remove any static charge before touching
the ROCKY-512 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.
z
Handle your ROCKY-512 SBC by its edges. Don’t touch IC chips,
leads or circuitry if not necessary.
z
Do not plug any connector or jumper while the power is on.
z
On board 64/128MB SDRAM and there is one 168-pin DIMM
socket to accept 3.3V non-buffered SDRAM. The max. Memory
size is 256MB.
2.3 Watchdog Timer Setting (JP5)
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. On the other hand, reading port 043/843H disables the
Watchdog Timer. For detail information about Watch-Dog Timer
please refer to Appendix A.
• JP5: Watchdog Active Type Setting
JP5
DESCRIPTION
2-3 Reset when WDT time-out
OPEN Disable WDT
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