Datasheet

90E32AS ENHANCED POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Register 55 April 2, 2013
5.4 CONFIGURATION AND CALIBRATION REGISTERS
5.4.1 CONFIGURATION REGISTERS
PLconstH
High Word of PL_Constant
PLconstL
Low Word of PL_Constant
Table-6 Configuration Registers
Register
Address Register Name
Read/Write
Type Functional Description Power-on Value and Comments
Configuration Registers
31H PLconstH R/W High Word of PL_Constant 0861H
32H PLconstL R/W Low Word of PL_Constant C468H
33H MMode0 R/W
HPF/Integrator On/Off, CF and all-phase energy
computation configuration
0087H
34H MMode1 R/W Pga Gain Configuration 0000H
35H PStartTh R/W Active Startup Power Threshold.
0000H.
16 bit unsigned integer, Unit: 0.00032 Watt
36H QStartTh R/W Reactive Startup Power Threshold.
0000H
16 bit unsigned integer, Unit: 0.00032 var
37H SStartTh R/W Apparent Startup Power Threshold.
0000H
16 bit unsigned integer, Unit: 0.00032 VA
38H PPhaseTh R/W
Startup power threshold (for |P|+|Q| of a phase) for
any phase participating Active Energy Accumula-
tion. Common for phase A/B/C.
0000H
16 bit unsigned integer,
Unit: 0.00032 Watt/var
39H QPhaseTh R/W
Startup power threshold (for |P|+|Q| of a phase) for
any phase participating ReActive Energy Accumula-
tion. Common for phase A/B/C.
0000H
16bit unsigned integer,
Unit: 0.00032 Watt/var
3AH SPhaseTh RW
Startup power threshold (for |P|+|Q| of a phase) for
any phase participating Apparent Energy Accumula-
tion. Common for phase A/B/C.
0000H
16 bit unsigned integer,
Unit: 0.00032 Watt/var
Address: 31H
Type: Read/Write
Default Value: 0861H
Bit Name Description
15:0 PLconstH[15:0]
The PLconstH[15:0] and PLconstL[15:0] bits are high word and low word of PL_Constant respectively.
PL_Constant is a constant which is proportional to the sampling ratios of voltage and current, and inversely proportional to the
Meter Constant. PL_Constant is a threshold for energy calculated inside the chip, i.e., energy larger than PL_Constant will be
accumulated as 0.01CFx in the corresponding energy registers and then output on CFx if one CF reaches.
It is suggested to set PL_constant as a multiple of 4 so as to double or redouble Meter Constant in low current state to save ver-
ification time.
Address: 32H
Type: Read/Write
Default Value: C468H
Bit Name Description
15:0 PLconstL[15:0]
The PLconstH[15:0] and PLconstL[15:0] bits are high word and low word of PL_Constant respectively.
It is suggested to set PL_constant as a multiple of 4.