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5.3.5
DIO Input Circuitry
The DIO input circuitry shares the output circuitry. The internal processor drives the Output Control signal to turn on
the output driver which will force the output LOW. When the state of the DIO input signal is to be read the processor
applies 3.0 V
to the Input Bias signal and reads the level detected at the Input Sense. If the output is inactive, an
DC
external signal may be used to force the input level LOW. A diode provides protection of external positive voltages,
allowing the Output driver to activate loads greater than the internal 3.3 V
.
DC
21 |
P a g e
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