ade7566 Analog Devices, Inc., ade7566 Datasheet - Page 69

• Manufacturer Part Number: ade7566
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

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 ADE7566/ADE7569.
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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.
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.
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External Voltage ADC Interrupt
The external voltage ADC can generate an ADC interrupt when
at least one of the following conditions occurs:
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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.
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.
ADE7566/ADE7569