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71M6513/71M6513H Demo Board User’s Manual
Page: 35 of 112
©
2005-2006 TERIDIAN Semiconductor Corporation
Revision 5.6
0x09 6000
VMAX
The nominal external RMS voltage that corresponds to 250mV peak at
the ADC input. The meter uses this value to convert internal quantities
to external. LSB=0.1V
0x0A 2080
IMAX
The nominal external RMS current that corresponds to 250mv peak at
the ADC input. The meter uses this value to convert internal quantities
to external. LSB=0.1A
0x0F 10
ALT_MUX_RATE
Sample rate control for neutral current detection (D6513T3C1 Demo
Boards only). The frequency of alternative multiplexer cycles
(measuring V3 and temperature) is given by:
RATE
MUX
ALT
f
_
_
6
.
2520
=
The default setting results in a frequency of 252Hz. See section 1.10.4
for details.
This address is only used by the “Neutral Current”
Demo Code. For other Demo Code revisions, XRAM
word address 0x0F is a reserved location.
0x13 44
ICREEP_THR
For each element, if
ISQSUM_X
of that element exceeds
ICREEP_THR
, the sample values for that element are not zeroed.
Otherwise, the accumulators for Wh, VARh, and VAh are not updated
and the instantaneous value of IRMS for that element is zeroed.
LSB = 9.4045*10
-13
IMAX
2
Wh
Demo Code revision 3.05:
The default value 44 is equivalent to
0.00644A
2
.
Table 1-6: MPU Input Parameters for Metering
MPU Input Parameters for Temperature Compensation
XDATA
Word
Address
Default
Value
Name
Description
0x04 0
Y_CAL
0x05 0
Y_CALC
0x06 0
Y_CALC2
Implement RTC trim.
1000
2
_
100
_
10
_
)
(
2
CALC
Y
T
CALC
Y
T
CAL
Y
ppm
CORRECTION
⋅
+
⋅
+
=
0x0B 0
PPMC
PPM/C*26.84. Linear temperature compensation. A positive value will
cause the meter to run faster when hot. This is applied to both V and I
and will therefore have a double effect on products. Default is 0.
0x0C 0
PPMC2
PPM/C
2
*1374. Square law compensation. A positive value will cause the
meter to run faster when hot. This is applied to both V and I and will
therefore have a double effect on products. Default is 0.
0x0D 22721
DEGSCALE
Scale factor for TEMP_X.
TEMP_X=DEGSCALE*2
-22
*(TEMP_RAW_X-TEMP_NOM).
Y_CAL, Y_CALC, Y_CALC2 are 16-bit signed integers, i.e. the range is –32,767 to +32,768
Table 1-7: MPU Input Parameters for Temperature Compensation
http://www.datasheetcatalog.com/