Datasheet
MAX71020
Single-Chip Electricity Meter AFE
23Maxim Integrated
Table 7. Register Map (continued)
Table 8. Hardware Control Register Map
*Default values given for standard CE code (2520 sample frequency, gain = 9).
NAME
BYTE
ADDRESS
R/W
DEFAULT
VALUE
DESCRIPTION
LOADED
BY
WSUM_X 0x084 R —
Signed sum of real energy (Wh) from both wattmeter
elements for the previous accumulation interval
—
W0SUM_X 0x085 R — Signed sum of real energy (Wh) from wattmeter element A —
W1SUM_X 0x086 R — Signed sum of real energy (Wh) from wattmeter element B —
VARSUM_X 0x088 R —
Signed sum of reactive energy (VARh) from both
wattmeter elements for the previous accumulation interval
—
VAR0SUM_X 0x089 R —
Signed sum of reactive energy (VARh) from wattmeter
element A
—
VAR1SUM_X 0x08A R —
Signed sum of reactive energy (VARh) from wattmeter
element B
—
I0SQSUM_X 0x08C R — Sum of squared samples from current sensor in phase A —
I1SQSUM_X 0x08D R — Sum of squared samples from current sensor in phase B —
V0SQSUM_X 0x090 R — Sum of squared samples from voltage sensor in phase A —
V1SQSUM_X 0x091 R — Sum of squared samples from voltage sensor in phase B —
I0SQRES_X 0x096 R — Residual current from current sensor in phase A —
I1SQRES_X 0x097 R — Residual current from current sensor in phase A —
I0_RAW 0x100 R — Most recent result of ADC conversion for current phase A —
V0_RAW 0x101 R — Most recent result of ADC conversion for voltage phase A —
I1_RAW 0x102 R — Most recent result of ADC conversion for current phase B —
V1_RAW 0x103 R — Most recent result of ADC conversion for voltage phase A —
NAME
BYTE
ADDRESS
R/W
DEFAULT
VALUE*
DESCRIPTION
DEVICEID 0x301 R
0x0000
1100
Contains identifying information for the device. Loaded by the LE.
BIT NAME DESCRIPTION
7:0 Reserved —
15:8 VERSION Version index. Currently, 0x12 is defined as die type A0B.
31:16 CHIP_ID
Family tag and feature tag of the device, currently 0x1001.
FAMILY/FEATURE TAG CE CODE
1000 Blank OTP
1001 2520 code
1002 5k code
STEMP 0x30A R —
Result of the temperature measurement. Only bits 26:16 are significant; all
other bits return zero.
VSENSE 0x30B R —
Result of the device V
V3P3SYS
measurement. Only bits 23:16 are significant; all
other bits return zero.