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AS8267 Datasheet(PDF) 31 Page - ams AG

Part # AS8267
Description  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
PDF  136 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS8267 Datasheet(HTML) 31 Page - ams AG

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Data Sheet AS8267 / AS8268
Revision 1.0, 19-Jun-07
Page 31 of 136
950
,
570
A
60
A
40
V
230
V
230
)
ideal
(
lev
_
Pulse
×
×
=
= 380,633
030
,
346
000
,
11
000
,
10
633
,
380
)
corrected
(
lev
_
Pulse
=
×
=
LED Meter Constant Selection (mconst, 9330h)
The LED pulses are derived directly from the fast internal pulses (204,800i/kWh).
The ‘mconst’ register in SREG specifies the LED pulse rate:
MSB
LSB
-
-
-
-
mconst[3]
mconst[2]
mconst[1]
mconst[0]
Bit
Symbol
Function
7
-
Not used
6
-
Not used
5
-
Not used
4
-
Not used
Bit3
Bit2
Bit1
Bit0
LED Pulse Rate
0
0
0
0
204,800
0
0
0
1
102,400
3
mconst[3]
0
0
1
0
51,200
0
0
1
1
25,600
0
1
0
0
12,800
0
1
0
1
6,400
2
mconst[2]
0
1
1
0
3,200
0
1
1
1
1,600
1
0
0
0
800
1
mconst[1]
1
0
0
1
400
1
0
1
0
200
1
0
1
1
100
0
mconst[0]
1
1
X
X
100
If the target meter constant is different from one of the selectable (mconst) meter constants defined above:
e.g. 1,000i/kWh (Target Pulse Rate)
The same formula
)
mconst
(
Rate
Pulse
LED
)
ref
(
PR
Ni
=
can be used, but Ni is calculated using the Target Pulse Rate:



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