MAXQ3180-RAN+ datasheet(77/101 Pages) MAXIM

77 / 101 page

Low-Power, Multifunction, Polyphase AFE

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Neutral Current and Harmonics

Auxiliary Channel Configuration (AUX_CFG) (0x010)

The MAXQ3180 can monitor the RMS value of one auxiliary channel in addition to its normal processing. The

Auxiliary Channel Configuration register selects which input the auxiliary channel processes and what processing is

applied to the auxiliary channel.

DSP System Configuration

System Clock Frequency (SYS_KHZ) (0x012)

This register contains the system clock frequency in kHz units. Because the default frequency is 8MHz, this register

defaults to 0x1F40.

Bit:

Name:

—

ORDH

Reset:

Bit:

Name:

ENHARM

ENAUX

—

AUX_MUX

Reset:

BIT

NAME

FUNCTION

15:13, 5:3

—

Reserved.

12:8

ORDH

Order of Harmonic (1–21). The output of harmonic voltage is read via virtual register 0x830 and current

at 0x840.

ENHARM

Enable Auxiliary Channel Harmonic Filter. When set, the auxiliary channel is processed through the

harmonic filter. The parameters for this filter can be set in the B0HARM and A1HARM registers.

ENAUX

Enable Auxiliary Channel. When set, enables auxiliary channel processing.

2:0

AUX_MUX

Auxiliary Channel Input Select. This three-bit field selects the input to be processed by the auxiliary

channel.

001 = IN

010 = VA

011 = IA

100 = VB

101 = IB

110 = VC

111 = IC

Bit:

Name:

System Clock Frequency High Byte

Reset:

0x1F

Bit:

Name:

System Clock Frequency Low Byte

Reset:

0x40

MAXQ3180-RAN+ Datasheet(PDF) 77 Page - Maxim Integrated Products

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