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ST72321R6-Auto 数据表(PDF) 72 Page - STMicroelectronics |
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ST72321R6-Auto 数据表(HTML) 72 Page - STMicroelectronics |
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72 / 243 page  I/O ports ST72321xx-Auto 72/243 Doc ID 13829 Rev 1 Figure 29. I/O port general block diagram Table 29. I/O port mode options Configuration mode Pull-up P-buffer Diodes to VDD to VSS Input Floating with/without Interrupt Off Off On On Pull-up with/without Interrupt On Output Push-pull Off On Open-drain (logic level) Off True open-drain NI NI NI(1) 1. The diode to VDD is not implemented in the true open-drain pads. A local protection between the pad and VSS is implemented to protect the device against positive stress. Legend: Off - Implemented not activated On - Implemented and activated NI - Not implemented DR DDR OR PAD VDD ALTERNATE ENABLE ALTERNATE OUTPUT 1 0 OR SEL DDR SEL DR SEL PULL-UP CONDITION P-BUFFER (see table below) N-BUFFER PULL-UP (see table below) 1 0 ANALOG INPUT If implemented ALTERNATE INPUT VDD DIODES (see table below) EXTERNAL SOURCE (eix) INTERRUPT CMOS SCHMITT TRIGGER REGISTER ACCESS |
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