71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
Other CE Parameters
Temperature Parameters
MAINEDGE_X is useful for implementing a real-time clock based on the input AC signal. MAINEDGE_X is the number of half-
cycles accounted for in the last accumulated interval for the AC signal.
TEMP_RAW may be used by the MPU to monitor chip temperature. Temperature compensation is implemented by the CE,
based on the value written to TEMP_NOM.
CE
Name
Default
Description
Address
0x11EC
0x105C
0x1054
TEMP_RAW_X
TEMP_NOM
DEGSCALE
N/A
N/A
Filtered, unscaled reading from the temperature sensor.
Reference temperature for temperature compensation.
Multiplier for temperature calculation.
19065
Scales all voltage and current inputs, based on the temperature
compensation mechanism. 16384 provides unity gain.
0x1048
GAIN_ADJ
16384
0x1080
0x1084
PPMC1
PPMC2
N/A
N/A
Linear parameter for temperature compensation.
Quadratic parameter for temperature compensation.
GAIN_ADJ is a scaling factor for measurements based on the temperature. GAIN_ADJ is controlled by the MPU for
temperature compensation.
Sag, Creep and Tamper Control
CE
Address
Name
Default
Description
Wh threshold for channels A and B.
LSB = 6.6952⋅10−13 ⋅ IMAX ⋅VMAX
0x1070
CREEP0_THR
8311
NACC
FS
0x1074
CREEP1_THR
8311
The default value is equivalent to 2.5W
The threshold for sag warnings. The default value is equivalent to 80V RMS
0x1050
0x1078
SAG_THR
443000
if VMAX = 600V. The LSB value is 1.80587*10-4V (RMS).
Nominal voltage to be applied to the larger of the two currents when neutral
tampering is detected. The default value is equivalent to 230V RMS.
VNOMINAL
1.27*108
Nominal power consumption to be applied when magnetic tampering is
detected.
NACC
LSB = 6.6952⋅10−13 ⋅ IMAX ⋅VMAX
0x107C
WNOMINAL
7646227
FS
The default value is equivalent to 0.65Wh per accumulation interval, or
2300Wh/h (230V, 10A).
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