90E32 Datasheet, PDF (50/71 Pages) Integrated Device Technology – Poly-Phase High-Performance Wide-Span Energy Metering IC

90E32
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Table-5 Configuration Registers
Register
Address
38H
Register Name
PPhaseTh
Read/Write
Type
R/W
39H
QPhaseTh
R/W
3AH
SPhaseTh
RW
3BH
CS0
R/W
Note: For details, please refer to IDT application note AN-644.
Functional Description
Power-on Value and Comments
Startup power threshold (for |P|+|Q| of a phase) for 0000H
any phase participating Active Energy Accumula- 16 bit unsigned integer,
tion. Common for phase A/B/C.
Unit: 0.00032 Watt/var
Startup power threshold (for |P|+|Q| of a phase) for 0000H
any phase participating ReActive Energy Accumula- 16bit unsigned integer,
tion. Common for phase A/B/C.
Unit: 0.00032 Watt/var
Startup power threshold (for |P|+|Q| of a phase) for 0000H
any phase participating Apparent Energy Accumula- 16 bit unsigned integer,
tion. Common for phase A/B/C.
Unit: 0.00032 Watt/var
Checksum 0 Checksum register.
421CH
(calculated value after reset)
ConfigStart
Configure Start Command
Address: 30H
Type: Read/Write
Default Value: 6886H
Bit
15 - 0
Name
Description
CalStart[15:0] Refer to 6.4.1 Start Registers and Associated Checksum Operation Scheme.
PLconstH
High Word of PL_Constant
Address: 31H
Type: Read/Write
Default Value: 0861H
Bit
Name
Description
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
PLconstH[15:0]
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.
PLconstL
Low Word of PL_Constant
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.
Register
50
December 9, 2011