CS5480 datasheet(40/70 Pages) CIRRUS

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CS5480

DS980F3

6.6.3 Configuration 2 (Config2) – Page 16, Address 0

Default = 0x00 0200

VFIX

Use internal RMS voltage reference instead of voltage input for average active power.

0 = Use voltage input. (Default)

1 = Use internal RMS voltage reference (VFRMS).

POS

Positive energy only. Suppress negative values in P1AVG and P2AVG. If a negative

value is calculated, a zero result will be stored.

0 = Positive and negative energy (Default)

1 = Positive energy only

ICHAN

Chooses which current channel is used for the PSUM, QSUM, SSUM registers.

Applicable only when MCFG[1:0] = 00 and IHOLD = 1.

0 = PSUM, QSUM, and SSUM registers are driven by current channel 1 (P1) (Default)

1 = PSUM, QSUM, and SSUM registers are driven by current channel 2 (P2).

IHOLD

IHOLD suspends automatic channel selection for total power calculations. Applicable

only when MCFG[1:0] = 00.

0 = Energy channel selected automatically by magnitude compare and on IVSP bit

(Default)

1 = Energy channel selected by user and depend on ICHAN configuration

Refer to Channel Select Level and Channel Select Minimum Amplitude registers

(IchanLEVEL) and PMIN (IRMSMIN) for the magnitudes compared.

IVSP

Use IRMS results instead of PAVG for automatic energy channel selection. Applicable

only when MCFG[1:0] = 00 and IHOLD = 0.

0 = Use P1AVG and P2AVG instead of I1RMS and I2RMS (Default)

1 = Use I1RMS and I2RMS instead of P1AVG and P2AVG

MCFG[1:0]

Meter Configuration bits are used to control how the meter interprets the current

channels when calculating total power — independently or collectively.

00 = 1V, 1I + Neutral mode; PSUM =P1AVG or P2AVG,QSUM =Q1AVG or Q2AVG,SSUM =S1orS2

(Default)

01 = 1V, 2I mode; PSUM = (P1AVG+P2AVG)/2, QSUM=(Q1AVG+Q2AVG)/2, SSUM=(S1+S2)/2

10 = Reserved

11 = Reserved

[16:15]

Reserved.

APCM

Selects the apparent power calculation method.

0 = VxRMS x IxRMS (Default)

1 = SQRT(PAVG2 + QAVG2)

[13]

Reserved.

ZX_LPF

Enable LPF in zero-cross detect.

0 = LPF disabled (Default)

1 = LPF enabled

AVG_MODE

Select averaging mode for low-rate calculations.

0 = Use SampleCount (Default)

1 = Use CycleCount

VFIX

POS

ICHAN

IHOLD

IVSP

MCFG[1]

MCFG[0]

APCM

ZX_LPF

AVG_MODE REG_CSUM_OFF

AFC

I2FLT[1]

654

I2FLT[0]

V2FLT[1]

V2FLT[0]

I1FLT[1]

I1FLT[0]

V1FLT[1]

V1FLT[0]

IIR_OFF

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