Operation and Application
Table 4–3 Description of Digital I/O pin level
Pin Type Description
IO1
Digital in High level voltage range: 5.0V±0.25V, low level
voltage range: 0V±0.25V.
Digital out High level voltage range: 5.0V±0.25V, The
maximum output current of IO1 is 0.5 mA. Low
level voltage range: 0V±0.25V.
IO2
Digital in High level voltage range: 5.0V±0.25V, low level
voltage range: 0V±0.25V.
Digital out High level voltage range: 5.0V±0.25V, The
maximum output current of IO2 is 0.5 mA. Low
level voltage range: 0V±0.25V.
GND
Ground Ground for digital inputs and outputs.
Table 4–4 Description of Digital I/O pin parameter
Ext IO1 Parameter setting for IO1.
Off Turn off the IO1 function.
Output Config IO1 as output pin.
L if out on When the output state of the instrument is
On, this pin outputs 0V. When the output
state of the instrument is Off, this pin out-
puts 5V.
H if out on When the output state of the instrument is
On, this pin outputs 5V. When the output
state of the instrument is Off, this pin out-
puts 0V.
Input Config IO1 as input pin.
L To out on When send 0V signal to IO1, the instru-
ment turns on the output. When send 5V
signal to IO1, the instrument turns off the
output.
H To out on When send 5V signal to IO1, the instru-
ment turns on the output. When send 0V
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