Changing Power-up Default
After power‑up the bit I/O unit is configured to input mode. In this
case, the I/O pins have a defined logical high level because of the
built-in 10 kΩ pull-up resistors.
Default setting
If you want to change the power-up default, you can set the I/O pins
to a defined logical low level by connecting a 1 kΩ pull-down resistor
from ground to each I/O pin.
Changing the setting
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Signal Connection to External Devices
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DS1103 Hardware Installation and Configuration November 2014
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