Unpacking Precautions; System Memory Dram; Watch-Dog Timer Setting; Clear Cmos Setup - Vox WAFER-5820 User Manual

2.2 Unpacking Precautions

Some components of WAFER-5820 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-5820 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-5820 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

The Watch-Dog Timer is enabled by reading port 443H. 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. The
Watch-Dog Timer is disabled by reading port 043/843H.detail
information on Watch-Dog Timer Refer to Appendix A
•
JP10 : Watch-Dog Active Type Setting
JP10
ACTIVATE NMI TO CPU WHEN WDT
1-2
TIME-OUT
2-3 RESET WHEN WDT TIME-OUT
OPEN DISABLE WDT
DESCRIPTION
9

2.5 Clear CMOS Setup

If you need to clear the CMOS Setup (for example forgot the
password you should clear the setup and then set the
password again.), you should close the JP9 about 3 seconds,
then open it again. Set back to normal operation mode, open
JP9.
•
JP9: Clear CMOS Setup (Reserve Function)
JP9
1-2
2-3

2.6 COM2 Setting JP12 , JP13

The COM2 (CN9) can supply +5V or +12V power to the serial
devices via RI pin (Pin 8) of the COM port connector. The max.
current is 1A with fuse protection, from these two connector' s
5V/12V output. If the output is set to 12V, make sure that you
have 12V to supply to the board.
CN9 Pin 8
RI Signal
+5V
+12V
COM2 RS-232, RS-422 or RS-485 Setting JP11
The COM2 (CN9) can be set to RS-232 or RS-422/485 for
industrial field site application. Moreover when this port set to
the RS-485 mode the board equipped self-tuner IC will
automatic sensing the data direction to eliminate the data
collision. This is especially
programming which do not allow the program to catch the
control pin at your wish.
DESCRIPTION
Normal Operation
Clear CMOS Setup
JP13 JP12
2-3 Don't care
1-2 2-3
1-2 1-2
important in WINDOWS
10