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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS8218 датащи(PDF) 62 Page - ams AG |
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AS8218 датащи(HTML) 62 Page - ams AG |
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62 / 123 page  Data Sheet AS8218 / AS8228 Revision 3.0, 31-May-06 Page 62 of 123 Timing: COUNT led Gate refp counted refp CINT Notes: 1) The COUNT signal is synchronized with ‘led’. 2) COUNT is reset and CINT is set using clk and checking for falling edge on Gate. 3) The PCNT register is only updated when counting is finished. Example: Select IO3 as the pulse reference input. Meter is 220Vmains; Imax = 20A Meter constant: 1,600imp/kWh Reference meter constant: 16 million imp/kWh Register settings: MPIO SET_EN0 (9505h): IO3 bit = 0 (output disabled) SEL_IN_REFP (950Ch): 02h DSP mconst (9330h): 07h (Ideal) Pulse_lev (932Ch – 932Ah) = A 20 A 40 V 220 V 230 950 , 570 × × = 1,193,804 ⇒ 12374Ch ⇒ 932Ah: 4Ch 932Bh: 37h 932Ch: 12h Procedure: Status1 (951Fh): 80h → starts pulse counting. When pulse counting is completed → CINT bit in Status1 = 1. The status of the CINT bit in Status1 may be checked to confirm that the pulse counting is complete. Alternatively, the time between 2 pulses may be calculated to determine the count cycle time (the first pulse is used for synchronization and the second pulse starts the count cycle). Following the pulse counting cycle, the number of pulses counted can be read from PCNT0/PCNT1/PCNT2 (951Bh/951Ch/951Dh). |
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