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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADF7021 датащи(PDF) 43 Page - Analog Devices |
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ADF7021 датащи(HTML) 43 Page - Analog Devices |
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43 / 64 page  Data Sheet ADF7021 Rev. B | Page 43 of 64 POWER-DOWN CE LOW WRITE TO REGISTER 5 (STARTS IF FILTER CALIBRATION) WAIT 0.2ms (COARSE CAL) OR WAIT 5.2ms (COARSE CALIBRATION + FINE CALIBRATION) WRITE TO REGISTER 11 (SET UP SWD) WRITE TO REGISTER 12 (ENABLE SWD) WRITE TO REGISTER 6 (SETS UP IF FILTER CALIBRATION) CE LOW POWER-DOWN Rx MODE WRITE TO REGISTER 3 (TURNS ON Tx/Rx CLOCKS) WRITE TO REGISTER 4 (TURNS ON DEMOD) WRITE TO REGISTER 10 (TURNS ON AFC) OPTIONAL. WRITE TO REGISTER 0 (TURNS ON PLL) WAIT 40µs (TYPICAL PLL SETTLING) CE HIGH WAIT 10µs (REGULATOR POWER-UP) WRITE TO REGISTER 1 (TURNS ON VCO) WAIT 0.7ms (TYPICAL VCO SETTLING) CE HIGH WAIT 10µs + 1ms (REGULATOR POWER-UP + TYPICAL XTAL SETTLING) XTAL REFERENCE TCXO REFERENCE OPTIONAL: ONLY NECESSARY IF AFC IS REQUIRED. OPTIONAL: ONLY NECESSARY IF SWD IS REQUIRED. OPTIONAL: ONLY NECESSARY IF IF FILTER FINE CAL IS REQUIRED. Figure 55. Power-Up Sequence for Receive Mode |
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