71M6541D Maxim, 71M6541D Datasheet - Page 133
71M6541D
Manufacturer Part Number
71M6541D
Description
The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are Teridian™ 4th-generation single-phase metering SoCs with a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and LCD driver
Manufacturer
Maxim
Datasheet
1.71M6541D.pdf
(166 pages)
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Part Number:
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Rev 2
Address
0x4A
0x4B
0x4C
0x21
0x22
0x23
0x45
0x46
0x47
0x48
0x49
CE
VSUM_ACCUM
WPULSE_CTR
WPULSE_FRAC
WSUM_ACCUM
VPULSE_CTR
VPULSE_FRAC
SUM_SAMPS
APULSEW
APULSER
WRATE
Name
KVAR
Table 90: CE Pulse Generation Parameters
Default
6444
2520
547
0
0
0
0
0
0
0
0
Description
where:
K = 66.1782 (Local Sensors)
K = 109.1587 (Remote Sensor)
N
See
The default value yields 1.0 Wh/pulse for VMAX = 600 V and
IMAX = 208 A. The maximum value for WRATE is 32,768 (2
Scale factor for VAR measurement.
SUM_SAMPS (N
Wh pulse (WPULSE) generator input to be updated by the MPU
when using external pulse generation. The output pulse rate is:
APULSEW * F
This input is buffered and can be updated by the MPU during a
conversion interval. The change takes effect at the beginning of
the next interval.
WPULSE counter.
Unsigned numerator, containing a fraction of a pulse. The value
in this register always counts up towards the next pulse.
Roll-over accumulator for WPULSE.
VARh (VPULSE) pulse generator input.
VPULSE counter.
Unsigned numerator, containing a fraction of a pulse. The value
in this register always counts up towards the next pulse.
Roll-over accumulator for VPULSE.
ACC
Table 83
= SUM_SAMPS[12:0] (CE RAM 0x23)
S
for the definition of X.
* 2
Kh
ACC
-32
=
).
71M6541D/F/G and 71M6542F/G Data Sheet
* WRATE * X * 2
WRATE
VMAX
⋅
⋅
IMAX
N
ACC
⋅
⋅
K
X
-14
.
⋅
Wh
/
pulse
15
133
).
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