Introduction
1 Definitions, Acronyms and Abbreviations
2 Overall Description
3 Metrology Interface Definition
- 3.1 Metrology Control Registers
- 3.2 Metrology Status Registers
  - 3.2.1 Metrology Firmware Version
    Metrology Firmware Version
  - 3.2.2 Metrology Status Register
    Metrology Status Register
  - 3.2.3 Metrology State Flags Register
    Metrology State Flags Register
  - 3.2.4 Waveform Capture Function Status
    Waveform Capture Function Status
  - 3.2.5 Measurement Interval Number
    Measurement Interval Number
  - 3.2.6 Number of Samples in the Last Measurement Interval
    Number of Samples in the Last Measurement Interval
  - 3.2.7 Phase Correction Filter Offset
    Phase Correction Filter Offset
  - 3.2.8 Dominant Line Voltage Fundamental Harmonic Frequency
    Dominant Line Voltage Fundamental Harmonic Frequency
  - 3.2.9 Line Voltage Fundamental Harmonic Frequency
    Line Voltage Fundamental Harmonic Frequency
  - 3.2.10 Sensor Temperature
    Sensor Temperature
  - 3.2.11 Phase Current Peak Registers
    Phase Current Peak Registers
  - 3.2.12 Neutral Current Peak Registers
    Neutral Current Peak Registers
  - 3.2.13 Voltage Peak Registers
    Voltage Peak Registers
  - 3.2.14 Compiled Feature Indicator Bits
    Compiled Feature Indicator Bits
  - 3.2.15 Pulse counters
    Pulse counters
  - 3.2.16 Zero-Crossing Sample Number of Phase-X Voltage
    Zero-Crossing Sample Number of Phase-X Voltage
  - 3.2.17 ATSENSE Calibration Trim Data, Registers: 0x41 – 0x44
    ATSENSE Calibration Trim Data, Registers: 0x41 – 0x44
  - 3.2.18 ATSENSE Calibration Trim Data, Registers: 0x45 – 0x48
    ATSENSE Calibration Trim Data, Registers: 0x45 – 0x48
- 3.3 Accumulated Output Quantities
- 3.4 Harmonic Analysis Output Quantities
- 3.5 Derived Output Quantities
4 Interface between Metrology and Application
5 Annex. Meter Forms
The service type determines what meter form is being implemented and how the Metrology DSP core interprets and processes the ADC values.
6 References
7 Revision History
Microchip Information

3.2.11 Phase Current Peak Registers

I_x_MAX is the maximum current peak absolute value of phase x, x = [A, B, C], in units of [Amp_pk scaled].

They can be reset by setting I_MAX_RESET to ‘1’.

The peak current may be calculated by the following formula:

$I_{x_{p e a k}} = \frac{I_{x_{M A X}}}{2^{29}} \times K_{I_{x}} = \frac{I_{x_{M A X}}}{2^{29}} \times \frac{K_I x}{2^{10}}$

Where K_I_x is the current conversion factor in float format, or K_Ix is the current conversion register value, and I_x_peak is the peak current of phase x, in unit of Amp.

Phase current max values, I_x_MAX for x=[A,B,C], are determined using FBW (Full Band-Width) baseband DSP-filtered data.

Name:	I_A_MAX/I_B_MAX/I_C_MAX
Property:	Read


Bit	31	30	29	28	27	26	25	24
	I_x_MAX[31:24]
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0


Bit	23	22	21	20	19	18	17	16
	I_x_MAX[23:16]
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	I_x_MAX[15:8]
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	I_x_MAX[7:0]
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0

Bits 31:0 – I_x_MAX[31:0] Max Phase-x Current During Measurement Interval (sQ2.29)