90E21 Datasheet, PDF (19/57 Pages) Integrated Device Technology – Single-Phase High-Performance Wide-Span Energy Metering IC

90E21/22/23/24
5
REGISTER
5.1 REGISTER LIST
Table-11 Register List
Register
Address
Register Name
00H
SoftReset
01H
SysStatus
02H
FuncEn
03H
SagTh
04H
SmallPMod
06H
LastSPIData
20H
CalStart
21H
PLconstH
22H
PLconstL
23H
Lgain
24H
Lphi
25H
Ngain
26H
Nphi
27H
PStartTh
28H
PNolTh
29H
QStartTh
2AH
QNolTh
2BH
MMode
2CH
CS1
30H
AdjStart
31H
Ugain
32H
IgainL
33H
IgainN
34H
Uoffset
35H
IoffsetL
36H
IoffsetN
37H
PoffsetL
38H
QoffsetL
39H
PoffsetN
3AH
QoffsetN
3BH
CS2
40H
APenergy
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Read/Write
Type
Functional Description
Comment^{note 1}
Page
Status and Special Register
W
Software Reset
P 21
R/C
System Status
different for various chips^{note 2, note 3}
P 22
R/W
Function Enable
different for various chips^{note 2}
P 23
R/W
Voltage Sag Threshold
P 23
R/W
Small-Power Mode
P 24
R
Last Read/Write SPI Value
P 24
Metering Calibration and Configuration Register
R/W
Calibration Start Command
P 25
R/W
High Word of PL_Constant
P 25
R/W
Low Word of PL_Constant
P 26
R/W
L Line Calibration Gain
P 26
R/W
L Line Calibration Angle
P 26
R/W
N Line Calibration Gain
Not applicable to the 90E21/22^{note 3}
P 27
R/W
N Line Calibration Angle
Not applicable to the 90E21/22^{note 3}
P 27
R/W
Active Startup Power Threshold
P 27
R/W
Active No-Load Power Threshold
P 28
R/W
Reactive Startup Power Threshold
Not applicable to the 90E21/23^{note 2}
P 28
R/W
Reactive No-Load Power Threshold
Not applicable to the 90E21/23^{note 2}
P 28
R/W
Metering Mode Configuration
different for various chips^{note 2, note 3}
P 29
R/W
Checksum 1
P 31
Measurement Calibration Register
R/W Measurement Calibration Start Command
P 32
R/W
Voltage rms Gain
P 32
R/W
L Line Current rms Gain
P 33
R/W
N Line Current rms Gain
Not applicable to the 90E21/22^{note 3}
P 33
R/W
Voltage Offset
P 33
R/W
L Line Current Offset
P 34
R/W
N Line Current Offset
Not applicable to the 90E21/22^{note 3}
P 34
R/W
L Line Active Power Offset
P 34
R/W
L Line Reactive Power Offset
Not applicable to the 90E21/23^{note 2}
P 35
R/W
N Line Active Power Offset
Not applicable to the 90E21/22^{note 3}
P 35
R/W
N Line Reactive Power Offset
Not applicable to the 90E21/22/23^{note 2, note 3} P 35
R/W
Checksum 2
P 36
Energy Register
R/C
Forward Active Energy
P 37
Register
19
January 10, 2012