Kantronics KAM 98, Руководство пользователя

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Microprocessor Watchdog Timer
The KAM’98 includes a watchdog timer within the microprocessor. In the un-
likely event that your TNC firmware gets into an infinite loop, the watchdog
timer will detect the failure and force a soft reset of the KAM’98. No parameters
will be lost due to this reset.
A/D Converters
Four A/D converter inputs are available to the KAM’98 and are used with the
Analog command. These inputs can be used to measure “DC” external voltages
from 0V to 5VDC, with up to 8-bit accuracy.
Note: If you want to measure voltages greater than +5VDC, the signals need to at-
tenuated by installing resistors on the printed circuit board to divide them down in
voltage. Choose resistance values to scale the desired input voltages to 5VDC max
at the test points on the printed circuit board. See the schematic for details.
+ Note: Maximum input measurement of +5VDC can be made. Maximum input
voltages to the A/D inputs should not exceed 50V or damage may occur.
KAM’98 Jumpers
The KAM’98 PC board has 26 jumpers for controlling the operation of the unit .
This section documents the KAM’98 jumpers by providing:
•
an overview listing of all jumpers (J1 through J26), including default
settings and a name and/or description for each jumper,
•
a jumper schematic that shows the location and pin names for each
jumper on the KAM’98 PC board, and
•
a detailed explanation of the function and settings of each jumper.
Appendix B: Advanced Information Microprocessor Watchdog Timer
User’s Guide 338 KAM’98 v 8.3