ADE5569 datasheet(72/148 Pages) AD

72 / 148 page

ADE5166/ADE5169/ADE5566/ADE5569

Preliminary Technical Data

Rev. PrB | Page 72 of 148

External Voltage ADC in PSM1 and PSM2

An external voltage conversion is initiated only by certain actions

that depend on the operating mode of the ADE5166/ADE5169/

ADE5566/ADE5569.

•

In PSM0 operating mode, the 8052 is active. External

voltage measurements are available in the background

measurement mode and by initiating a single measurement.

•

In PSM1 operating mode, the 8052 is active and the part is

powered from battery. Single external voltage measurements

can be initiated by setting the VDCIN_ADC_GO bit in the

start ADC measurement SFR (ADCGO, 0xD8). Background

external voltage measurements are not available.

•

In PSM2 operating mode, the 8052 is not active. External

voltage conversions are available through the background

measurement mode only.

The external voltage ADC in the VDCIN ADC value SFR

(VDCINADC, 0xEF) is updated with a new value only when

an external voltage ADC interrupt occurs.

External Voltage ADC Interrupt

The external voltage ADC can generate an ADC interrupt when

at least one of the following conditions occurs:

•

The difference between the new external voltage ADC

value and the last external voltage ADC value generating

an ADC interrupt is larger than the value set in the

VDCIN_DIFF[2:0] bits in the temperature and supply

delta SFR (DIFFPROG, 0xF3).

•

The external voltage ADC conversion initiated by setting

VDCIN_ADC_GO finishes.

When the ADC interrupt occurs, a new value is available in the

VDCIN ADC value SFR (VDCINADC, 0xEF). Note that there is

no flag associated with this interrupt.

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