Analog Configuration; Figure 20. Alternate Function Configuration; Figure 21. High Impedance-Analog Configuration - ST STM32F410 Reference Manual

General-purpose I/Os (GPIO)
6.3.12

Analog configuration

When the I/O port is programmed as analog configuration:
•
The output buffer is disabled
•
The Schmitt trigger input is deactivated, providing zero consumption for every analog
value of the I/O pin. The output of the Schmitt trigger is forced to a constant value (0).
•
The weak pull-up and pull-down resistors are disabled
•
Read access to the input data register gets the value "0"
Note: In the analog configuration, the I/O pins cannot be 5 Volt tolerant.
Figure 21
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Figure 20. Alternate function configuration

shows the high-impedance, analog-input configuration of the I/O port bit.

Figure 21. High impedance-analog configuration

RM0401 Rev 3
RM0401