User Manual

Page 24 of 39
Using the digital input output pins consists of the following:
• Configuring the pins
Select direction (input or output), enabling or disabling pullup
resistors for pins configured as digital inputs, and setting the
initial output value for pins configured as digital outputs. These
parameters define the configuration of the pins when a reset
occurs. Also the direction and pullup parameters are used to set
the state of the pins after exiting sleep mode.
• Configuring the sleep state of the pins
Select direction (input or output), enabling or disabling pullup
resistors for pins configured as digital inputs, and setting the
output value for pins configured as digital outputs. Although
these parameters are the same as those shown in the
“Configuring the pins” item shown above, they are independent
and are the state of the pins when the FreeStar module is put
into Sleep Mode.
• Reading the state of the pins configured as inputs
Read the digital value (0 or 1) of the signal applied to the pins
configured as inputs.
• Setting the state of the pins configured as outputs
Set the digital value (0 or 1) for the pins configured as outputs.