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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STR720 데이터시트(PDF) 347 Page - STMicroelectronics |
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STR720 데이터시트(HTML) 347 Page - STMicroelectronics |
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347 / 401 page  STR720 - GENERAL PURPOSE I/O PORTS 347/401 23.3.3 Output Configuration When the IO Port is programmed as Output: ■ The Output Buffer is turned on in Open Drain or Push-Pull configuration ■ The data in the Output Latch drives the IO pin ■ A reading access to the IO Data register gets the Output Latch value. The Figure 66 on page 347 shows the Output Configuration of the IO Port bit. 23.3.4 Alternate Function Configuration When the IO Port is programmed as Alternate Function: ■ The Output Buffer is turned on in Open Drain or Push-Pull configuration ■ The Output Buffer is driven by the signal coming from the peripheral (alternate function out) ■ The data present on the IO pin is sampled into the Input Latch every clock cycle ■ A reading access to the Data register gets the value in the Input Latch. Figure 66. Output Configuration I/O PIN Alternate Function (OUT) Alternate Function (IN) Open Drain Push-Pull |
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