Datasheet

MAX71020
Single-Chip Electricity Meter AFE
21Maxim Integrated
Table 7. Register Map (continued)
NAME
BYTE
ADDRESS
R/W
DEFAULT
VALUE
DESCRIPTION
LOADED
BY
PPMC 0x01B R/W 0x0000 0000
Linear coefficient for temperature compensation. A
default coefficient can be established by copying
PPMCATE into PPMC.
Host
PPMC2 0x01C R/W 0x0000 0000
Quadratic coefficient for temperature compensation.
A default coefficient can be obtained by copying
PPMC2ATE into PPMC2.
Host
PPMCATE 0x01D R/W Varies Linear coefficient for temperature compensation from ATE LE
PPMC2ATE 0x01E R/W Varies
Quadratic coefficient for temperature compensation
from ATE
LE
CECONFIG 0x020 R/W 0x0030 3301
Configuration register for CE operation
Host
BIT NAME DESCRIPTION
0 PULSE_SLOW
Reduces pulse output rate
by a factor of 64. Must not
be used with PULSE_FAST.
1 PULSE_FAST
Increases pulse output rate
by a factor of 16. Must not
be used with PULSE_SLOW.
7:2 Reserved
19:8 SAG_CNT
Number of consecutive
samples below SAG_THR
before sag event is declared.
20 SAG_INT
Enables sag detect output on
YPULSE
21 EDGE_INT
Enables zero-crossing output
on XPULSE
22 EXT_TEMP
External control of GAIN_
ADJn if set
23 PULSE_SELECT
Selector for Wh and VARh
pulse generators (0 = phase
A, 1 = phase B)
24 CREEP 1 if meter is in creep mode
WRATE 0x021 R/W 0x0000 441E
Sets the meter constant for pulse outputs. See the
Pulse Generation section.
Host
KVAR 0x022 R/W 0x0000 192C Internal scaling factor for VARh measurements. LE
SUM_PRE 0x023 R/W 0x0000 09D8
= 2520. For information only. This location is not used
by the code.
Host
SAG_THR 0x024 R/W 0x016D 2490
Voltage threshold for sag warnings. See the CE Status
and Control section
Host
QUANT_V0 0x025 R/W 0x0000 0000 Truncation/noise compensation for voltage in phase A Host