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AN2710 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN2710
Description  Safe GPIO port configuration in STR7xx devices
PDF  30 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2710 Datasheet(HTML) 11 Page - STMicroelectronics

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AN2710
STR71x & STR73x I/O ports
11/30
1.2.6
High impedance-analog input configuration
When the I/O port is programmed as high impedance-analog input configuration:
●
The output buffer is forced tristate
●
The input buffer is disabled (the alternate function input is forced to a constant value)
●
The analog input can be input to an analog peripheral
●
A read access to the I/O Data register gets the output latch value
Figure 6 shows the high impedance-analog input configuration of the I/O port bit.
Figure 6.
High impedance-analog input configuration
Refer to the STR71x and STR73x reference manuals for the I/O port register description.
I/O pin
Alternate function (OUT)
Tristate
Analog input
ai14920



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