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90E21 Datasheet(PDF) 19 Page - Integrated Device Technology |
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90E21 Datasheet(HTML) 19 Page - Integrated Device Technology |
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19 / 57 page  90E21/22/23/24 SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC Register 19 January 10, 2012 5 REGISTER 5.1 REGISTER LIST Table-11 Register List Register Address Register Name Read/Write Type Functional Description Comment note 1 Page Status and Special Register 00H SoftReset W Software Reset P21 01H SysStatus R/C System Status different for various chips note 2, note 3 P22 02H FuncEn R/W Function Enable different for various chips note 2 P23 03H SagTh R/W Voltage Sag Threshold P23 04H SmallPMod R/W Small-Power Mode P24 06H LastSPIData R Last Read/Write SPI Value P24 Metering Calibration and Configuration Register 20H CalStart R/W Calibration Start Command P25 21H PLconstH R/W High Word of PL_Constant P25 22H PLconstL R/W Low Word of PL_Constant P26 23H Lgain R/W L Line Calibration Gain P26 24H Lphi R/W L Line Calibration Angle P26 25H Ngain R/W N Line Calibration Gain Not applicable to the 90E21/22 note 3 P27 26H Nphi R/W N Line Calibration Angle Not applicable to the 90E21/22 note 3 P27 27H PStartTh R/W Active Startup Power Threshold P27 28H PNolTh R/W Active No-Load Power Threshold P28 29H QStartTh R/W Reactive Startup Power Threshold Not applicable to the 90E21/23 note 2 P28 2AH QNolTh R/W Reactive No-Load Power Threshold Not applicable to the 90E21/23 note 2 P28 2BH MMode R/W Metering Mode Configuration different for various chips note 2, note 3 P29 2CH CS1 R/W Checksum 1 P31 Measurement Calibration Register 30H AdjStart R/W Measurement Calibration Start Command P32 31H Ugain R/W Voltage rms Gain P32 32H IgainL R/W L Line Current rms Gain P33 33H IgainN R/W N Line Current rms Gain Not applicable to the 90E21/22 note 3 P33 34H Uoffset R/W Voltage Offset P33 35H IoffsetL R/W L Line Current Offset P34 36H IoffsetN R/W N Line Current Offset Not applicable to the 90E21/22 note 3 P34 37H PoffsetL R/W L Line Active Power Offset P34 38H QoffsetL R/W L Line Reactive Power Offset Not applicable to the 90E21/23 note 2 P35 39H PoffsetN R/W N Line Active Power Offset Not applicable to the 90E21/22 note 3 P35 3AH QoffsetN R/W N Line Reactive Power Offset Not applicable to the 90E21/22/23 note 2, note 3 P35 3BH CS2 R/W Checksum 2 P36 Energy Register 40H APenergy R/C Forward Active Energy P37 |
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