ADE7880 datasheet(80/104 Pages) AD

80 / 104 page

ADE7880

Data Sheet

Rev. A | Page 80 of 104

HSCLK

HSDATA

HSA

IAVW (32-BIT)

VAWV (32-BIT)

IBWV (32-BIT)

CFVAR (32-BIT)

7 HCLK

CYCLES

7 HCLK

CYCLES

Figure 109. HSDC Communication for HSIZE = 0, HGAP = 1, HXFER[1:0] = 00, and HSAPOL = 0

HSCLK

HSDATA

HSA

IAVW (BYTE 3)

IAVW (BYTE 2)

IAVW (BYTE 1)

CFVAR (BYTE 0)

7 HCLK

CYCLES

7 HCLK

CYCLES

Figure 110. HSDC Communication for HSIZE = 1, HGAP = 1, HXFER[1:0] = 00, and HSAPOL = 0

ADE7880 QUICK SETUP AS ENERGY METER

An energy meter is usually characterized by the nominal

current In, nominal voltage Vn, nominal frequency fn, and the

meter constant MC.

To quickly set up the ADE7880, execute the following steps:

Select the PGA gains in the phase currents, voltages and

neutral current channels: Bits[2:0] (PGA1), Bits[5:3]

(PGA2) and Bits[8:6] (PGA3) in the Gain register.

If Rogowski coils are used, enable the digital integrators in

the phase or neutral currents channels: Bit 0 (INTEN) in

CONFIG register and Bit 3 (ININTEN) in CONFIG3

If fn = 60 Hz, set Bit 14 (SELFREQ) to 1 in the

COMPMODE register.

Initialize CF1DEN, CF2DEN, and CF3DEN registers based

in Equation 49.

Initialize WTHR, VARTHR, VATHR, VLEVEL and

VNOM registers based Equation 26, Equation 37, Equation

44, Equation 22, and Equation 42, respectively.

Enable the data memory RAM protection, by writing

0xAD to an internal 8-bit register located at Address

0xE7FE, followed by a write of 0x80 to an internal 8-bit

Start the DSP by setting Run = 1.

For a quick setup of the ADE7880 harmonic calculations,

see the Recommended Approach to Managing Harmonic

Calculations section.

ADE7880 EVALUATION BOARD

An evaluation board built upon the ADE7880 configuration

is available. Visit www.analog.com/ADE7880 for details.

DIE VERSION

The register named version identifies the version of the die.

It is an 8-bit, read-only register located at Address 0xE707.

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ADE7880 数据表(PDF) 80 Page - Analog Devices

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