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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST72141K2-AUTO датащи(PDF) 9 Page - STMicroelectronics |
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ST72141K2-AUTO датащи(HTML) 9 Page - STMicroelectronics |
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9 / 131 page  ST72141K2-Auto 9/131 1.3 EXTERNAL CONNECTIONS The following figure shows the recommended ex- ternal connections for the device. The VPP pin is only used for programming OTP and EPROM devices and must be tied to ground in user mode. The 10nF and 0.1µF decoupling capacitors on the power supply lines are a suggested EMC perform- ance/cost tradeoff. The external reset network is intended to protect the device against parasitic resets, especially in noisy environments. Unused I/Os should be tied high to avoid any un- necessary power consumption on floating lines. An alternative solution is to program the unused ports as inputs with pull-up. Figure 4. Recommended External Connections VPP VDD VSS OSC1 OSC2 RESET VDD 0.1µF + See Clocks Section VDD 0.1µF 0.1µF EXTERNAL RESET CIRCUIT Or configure unused I/O ports Unused I/O 10µF 4.7K 10K by software as input with pull-up VDD Detector (LVD) is used Optional if Low Voltage VDD VSS |
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