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ST7LITEU05 数据表(PDF) 50 Page - STMicroelectronics |
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ST7LITEU05 数据表(HTML) 50 Page - STMicroelectronics |
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50 / 115 page  ST7LITEU05 ST7LITEU09 50/115 I/O PORTS (Cont’d) Table 16. I/O Port Configurations Notes: 1. When the I/O port is in input configuration and the associated alternate function is enabled as an output, reading the DR register will read the alternate function output status. 2. When the I/O port is in output configuration and the associated alternate function is enabled as an input, the alternate function reads the pin status given by the DR register content. Hardware Configuration CONDITION PAD VDD RPU EXTERNAL INTERRUPT POLARITY DATA BUS PULL-UP INTERRUPT DR REGISTER ACCESS W R FROM OTHER PINS SOURCE (eix) SELECTION DR REGISTER CONDITION ALTERNATE INPUT ANALOG INPUT PAD RPU DATA BUS DR DR REGISTER ACCESS R/W VDD ALTERNATE ALTERNATE ENABLE OUTPUT REGISTER PAD RPU DATA BUS DR DR REGISTER ACCESS R/W VDD ALTERNATE ALTERNATE ENABLE OUTPUT REGISTER 1 |
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