ST7262XXX Datasheet, PDF (33/139 Pages) STMicroelectronics – Low speed USB 8-bit MCU with 3 endpoints

ST7262xxx
I/O PORTS (Cont’d)
Analog Alternate Functions
have clocking pins located close to a selected an-
When the pin is used as an ADC input, the I/O ^{alog pin.}
must be configured as input. The analog multiplex- Warning: The analog input voltage level must be
er (controlled by the ADC registers) switches the within the limits stated in the Absolute Maximum
analog voltage present on the selected pin to the Ratings.
common analog rail which is connected to the
ADC input.
9.2.4 I/O Port Implementation
It is recommended not to change the voltage level
The hardware implementation on each I/O port de-
pends on the settings in the DDR register and spe-
or loading on any port pin while conversion is in
Obsolete ^{Product(s) - Obsolete Product(s) progress. Furthermore it is recommended not to}
cific features of the I/O port such as ADC Input or
true open drain.
Doc ID 6996 Rev 5
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