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AS8267 데이터시트(PDF) 66 Page - ams AG |
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AS8267 데이터시트(HTML) 66 Page - ams AG |
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66 / 136 page ![]() Data Sheet AS8267 / AS8268 Revision 1.0, 19-Jun-07 Page 66 of 136 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). The ideal number of pulses counted assuming the meter is perfectly calibrated would be: 000 10 600 1 000 000 16 , , , , Ni = = Assuming that we count 11,000 pulses, the (Ideal) Pulse_lev must be changed by the factor: 10,000/11,000 = 0.909 The new Pulse_lev = 1,193,804 x 0.909 = 1,085,168 ⇒ 108EF0h ⇒ 932Ah: F0h 932Bh: 8Eh 932Ch: 10h |
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