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TC1272AMVNBTR Scheda tecnica(PDF) 5 Page - Microchip Technology |
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TC1272AMVNBTR Scheda tecnica(HTML) 5 Page - Microchip Technology |
5 / 12 page 2004 Microchip Technology Inc. DS21877A-page 5 TC1272A 3.3 Controllers and Processors With Bidirectional I/O Pins Some microcontrollers have bidirectional reset pins. Depending on the current drive capability of the controller pin, an indeterminate logic level may result if there is a logic conflict. This can be avoided by adding a 4.7 k Ω resistor in series with the output of the TC1272A (Figure 3-3). If there are other components in the system that require a reset signal, they should be buffered so as not to load the reset line. If the other components are required to follow the reset I/O of the microcontroller, the buffer should be connected as shown with the solid line. FIGURE 3-3: Interfacing the TC1272A to a Bidirectional RESET I/O. TC1272A V DD RESET GND RESET GND Buffered RESET To Other System Components 4.7 k Ω Buffer Micro- TC1272A RESET GND RESET GND Buffered RESET To Other System Components PICmicro® 4.7 k Ω Buffer MCU |
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