ADE7953 datasheet(49/68 Pages) AD

49 / 68 page

Data Sheet

ADE7953

Rev. A | Page 49 of 68

ALTERNATIVE OUTPUT FUNCTIONS

The ADE7953 includes three output pins that are configured by

default to output power quality information.

•

Pin 1 (ZX) provides a voltage channel zero-crossing signal,

as described in the Voltage Channel Zero Crossing section.

•

Pin 21 (ZX_I) provides a current channel zero-crossing

signal, as described in the Current Channel Zero Crossing

section.

•

Pin 20 (REVP) provides polarity information, as described

in the

section.

Reverse Power

To provide flexibility and to accommodate a variety of design

requirements, the ADE7953 can be configured to output a

variety of alternative power quality signals on any of these

three outputs. Alternative functions are configured using the

ALT_OUTPUT register (Address 0x110).

Table 8 summarizes the functions that can be output on Pin 1,

Pin 21, and Pin 20. Note that the default functions of ZX, ZX_I,

and REVP can be configured to output on any one of Pin 1,

Pin 21, or Pin 20.

As described in Table 8, the description of each function can be

found in the corresponding section of this data sheet. If an alter-

native output function is enabled on Pin 1, Pin 21, or Pin 20, the

function can be configured and will be performed as described

in the corresponding section. The alternative function will, how-

ever, appear as an unlatched output on Pin 1, Pin 21, or Pin 20.

To enable an alternative function, the ZX_ALT, ZXI_ALT, and

REVP_ALT bits in the ALT_OUTPUT register must be set. The

interrupt enable associated with the alternative output does not

need to be enabled in order for it to be present on Pin 1, Pin 21,

or Pin 20. Enabling an alternative output does not affect the

primary function of the feature.

Table 8. Alternative Outputs

Function

See This Section

Zero-crossing detection

(voltage channel)

Voltage Channel Zero Crossing

Zero-crossing detection

(current channels)

Current Channel Zero Crossing

Reverse power indication

Reverse Power

Voltage sag detection

Voltage Sag Detection

Active energy no-load

detection (Current Channel A)

Active Energy No-Load

Detection

Active energy no-load

detection (Current Channel B)

Active Energy No-Load

Detection

Reactive energy no-load

detection (Current Channel A)

Reactive Energy No-Load

Detection

Reactive energy no-load

detection (Current Channel B)

Reactive Energy No-Load

Detection

Waveform sampling, data ready

Instantaneous Powers and

Waveform Sampling

Interrupt output (Current

Channel B)

Current Channel B Interrupts

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