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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM6548 датащи(PDF) 147 Page - Texas Instruments |
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AM6548 датащи(HTML) 147 Page - Texas Instruments |
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147 / 299 page  Device WKUP_LFOSC0_XO WKUP_LFOSC0_XI C f1 Crystal Rd C f2 (Optional) SPRSP08_PCB_CLK_OSC_3 Rbias (Optional) PCB Ground Device OSC1_XO OSC1_XI SPRSP08_PCB_CLK_OSC_NU1 Rpd PCB Ground NC 147 AM6548, AM6528, AM6546 AM6526, AM6527 www.ti.com SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018 Submit Documentation Feedback Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527 Specifications Copyright © 2017–2018, Texas Instruments Incorporated 5.11.4.1.5 Auxiliary OSC1 Not Used Figure 5-20 shows the recommended oscillator connections when OSC1 is not used. OSC1_XI must be connected to VSS through an external pull resistor (Rpd) to ensure this input is held to a valid low level when unused since the internal pull-down resistor is disabled by default. Figure 5-20. OSC1 Not Used 5.11.4.1.6 WKUP_LFOSC0 Internal Oscillator Clock Source Figure 5-21 shows the recommended crystal circuit. It is recommended that preproduction printed-circuit board (PCB) designs include the two optional resistors Rbias and Rd in case they are required for proper oscillator operation when combined with production crystal circuit components. In most cases, Rbias is not required and Rd is a 0 ohm resistor. These resistors may be removed from production PCB designs after evaluating oscillator performance with production crystal circuit components installed on preproduction PCBs. Figure 5-21. WKUP_LFOSC0 Crystal Implementation |
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