參數(shù)資料
型號(hào): ST72P63BH4T1
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48
封裝: 7 X 7 MM, ROHS COMPLIANT, LQFP-48
文件頁數(shù): 73/145頁
文件大小: 2984K
代理商: ST72P63BH4T1
ST7263BDx ST7263BHx ST7263BKx ST7263BE
33/145
I/O ports (Cont’d)
Analog alternate function
When the pin is used as an ADC input the I/O must
be configured as a floating input. The analog mul-
tiplexer (controlled by the ADC registers) switches
the analog voltage present on the selected pin to
the common analog rail which is connected to the
ADC input.
It is recommended not to change the voltage level
or loading on any port pin while conversion is in
progress. Furthermore it is recommended not to
have clocking pins located close to a selected an-
alog pin.
Warning: The analog input voltage level must be
within the limits stated in the Absolute Maximum
Ratings.
10.3 I/O port implementation
The hardware implementation on each I/O port de-
pends on the settings in the DDR register and spe-
cific feature of the I/O port such as ADC Input or
true open drain.
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