Figure 7. Variable Resistor Circuit Of The Wiz220Io Base Board - Wiznet WIZ220IO User Manual

⑦ Factory Reset button
Factory reset button can recover configuration parameter to factory default values. To reset the
module's parameters to factory default, hold down the factory reset button when you turn power
switch on.
⑧ Variable Resistor (VR)
You can control analog input value with variable resistor. The WIZ220IO's analog input is
voltage type and its range is 0V to Vcc(5V). Also, its value was translated to 0~4095 as each
input port has 12-bit resolution.

Figure 7. Variable Resistor Circuit of the WIZ220IO Base Board

⑨ Analog Output Through Hole
It can be connected to external device by user application. Each port outputs its value as
voltage level, and the range of output voltage is '0~4V'. The maximum output value is 4095 that
generates 4V level. The hole pitch is 2.54mm.
5V_input
VR1
VR
R1
2
Y
200
GNDAA
5V_input
VR2
VR
R2
2
Y
200
GNDAA
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WIZ220IO User Manual V1.0
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