71M6534H Demo Board User’s Manual
Page: 34 of 86
© 2005-2007 TERIDIAN Semiconductor Corporation
V2-0
XRAM Word
Address
Default
Value
Name
Description
0x07 0
PULSEW_SRC
This address contains a number that points to the selected pulse
source for the Wh output. Selectable pulse sources are listed in
Table 1-8.
0x08 4
PULSER_SRC
This address contains a number that points to the selected pulse
source for the VARh output. Selectable pulse sources are listed
in Table 1-8.
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 for channel A. The meter uses this value
to convert internal quantities to external. LSB=0.1A
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.
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.
0x0D
PULSEX_SRC
This address contains a number that points to the selected pulse
source for the XPULSE output. Selectable pulse sources are
listed in Table 1-8.
0x0E
PULSEY_SRC
This address contains a number that points to the selected pulse
source for the YPULSE output. Selectable pulse sources are
listed in Table 1-8.
0x0F 2
SCAL
Count of accumulation intervals for auto-calibration.
0x10 2400
VCAL
Applied voltage for auto-calibration. LSB = 0.1V rms of AC signal
applied to all elements during calibration.
0x11 300
ICAL
Applied current for auto-calibration. LSB = 0.1A rms of AC signal
applied to all elements during calibration. Power factor must be
1.
0x12 75087832
VTHRSHLD
Voltage to be used for creep detection, measuring frequency,
zero crossing, etc.
0x13 50
PULSE_WIDTH
Pulse width in µs = (2*Puls 1)*397. 0xFF disables this
feature. Takes effect only at start-up.
0x14 --
TEMP_NOM
Nominal (reference) temperature, i.e. the temperature at which
calibration occurred. LSB = Units of
TEMP_RAW
, from CE.
0x15 --
NCOUNT
The count of accumulation intervals that the neutral current must
be above
INTHRSHLD
required to set the “excess neutral” error
bit.
0x16 --
INTHRSHLD
The neutral current threshold.
16
2
IxSQSUM
⋅
=
LSB
Table 1-7: MPU Input Parameters for Metering
