
MAX71020
Single-Chip Electricity Meter AFE
Table 7. Register Map (continued)
NAME
QUANT_I0
QUANT_0
QUANT_VAR0
QUANT_V0
QUANT_I0
QUANT_0
QUANT_VAR0
TEMP22
GAINADJ_0
GAINADJ_1
GAINADJ_2
APULSEW
WPULSE_CTR
WPULSE_FRAC
WSUM_ACCUM
AVPULSER
VPULSE_CTR
VPULSE_FRAC
VSUM_ACCUM
BYTE
ADDRESS
0x026
0x027
0x028
0x029
0x02A
0x02B
0x02C
0x03C
0x040
0x041
0x042
0x044
0x045
0x046
0x047
0x048
0x049
0x04A
0x04B
0x04C…0x07F
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
DEFAULT
VALUE
0x0000 0000
0x0000 0000
0x0000 0000
0x0000 0000
0x0000 0000
0x0000 0000
0x0000 0000
0x0000 024D
0x0000 4000
0x0000 4000
0x0000 4000
—
—
—
—
—
—
—
—
—
DESCRIPTION
Truncation/noise compensation for current in phase A
Truncation/noise compensation for real power in phase A
Truncation/noise compensation for reactive power in
phase A
Truncation/noise compensation for voltage in phase B
Truncation/noise compensation for current in phase B
Truncation/noise compensation for real power in phase B
Truncation/noise compensation for reactive power in
phase B
Temperature reading at 22 N C. Used to calculate
temperature deviation from 22 N C
Adjusts the amplitude for voltage inputs VA and VB for
temperature compensation. Default = unity gain.
Adjusts the amplitude for current input IA. Default =
unity gain.
Adjusts the amplitude for current input IB. Default =
unity gain.
Pulse counter for Wh (real power)
Pulse generator numerator for Wh (real power)
Pulse g enerato r rollover accumulator for Wh (real power)
Pulse counter for Wh (real power)
Pulse generator numerator for Wh (real power)
Pulse g enerato r rollover accumulator for Wh (real power)
Used b y CE fo r internal variables
LOADED
BY
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
—
—
—
—
—
—
—
—
—
Status of the Compute Engine
BIT
0
—
—
DESCRIPTION
Sag status for voltage phase A.
Automatically clears when the voltage
rises above SAG_THR.
CESTATUS
0x080
R
—
Sag status for voltage phase B.
—
1
2
3
31:4
—
—
—
—
Automatically clears when the voltage
rises above SAG_THR.
Square wave at exact line frequency
TEMP_X
FREQ_X
MAINEDGE_X
0x081
0x082
0x083
R
R
R
—
—
—
Temperature deviation from TEMP22
Fundamental line frequency in units of (2520.6 x 2 -32 ) Hz
Number of voltage zero crossings of either direction
during the previous accumulation interval
—
—
—
Maxim Integrated
22