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AS8267 bảng dữ liệu(PDF) 66 Page - ams AG

tên linh kiện AS8267
Giải thích chi tiết về linh kiện  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
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AS8267 bảng dữ liệu(HTML) 66 Page - ams AG

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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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