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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TH71221 датащи(PDF) 25 Page - Melexis Microelectronic Systems |
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TH71221 датащи(HTML) 25 Page - Melexis Microelectronic Systems |
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25 / 44 page  TH71221 27 to 930MHz FSK/FM/ASK Transceiver 39010 071221 Page 25 of 44 Data Sheet Rev. 005 June/07 5.1.5 D – word Name Bits Description Feedback divider ratio in TX operation mode NT [16:0] 64d .. 131071d Set the unlock condition of the PLL ERTM [18:17] 00 01 10 11 2 clocks 4 clocks 8 clocks 16 clocks #default Set the maximum allowed number of reference clocks (1/fRO) during the phase detector output signals (UP & DOWN) can be in-consecutive. Set the lock condition of the PLL LDTM [20:19] 00 01 10 11 4 clocks 16 clocks 64 clocks 256 clocks #default Set the minimum number of consecutive edges of phase detector output cycles, without appearance of any unlock condition. Set mode of modulation control: 0 external modulation control #default Modulation will be set via pin ASK/FSK. 1 internal modulation control MODCTRL [21] Modulation will be set via bit MODSEL (bit 19 in A-word). Nevertheless pin ASK/FSK must be connected to either VCC or VEE. |
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