ade7166 Analog Devices, Inc., ade7166 Datasheet - Page 72

• Manufacturer Part Number: ade7166
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

ADE7566/ADE7569/ADE7166/ADE7169
ENERGY REGISTER SCALING
The ADE7566/ADE7569/ADE7166/ADE7169 provide
measurements of active, reactive, and apparent energies that use
separate paths and filtering for calculation. The difference in
data paths can result in small differences in LSB weight between
active, reactive, and apparent energy registers. These
measurements are internally compensated so the scaling is nearly
one to one. The relationship between these registers is shown in
Table 46.
Table 46. Energy Registers Scaling
Line Frequency = 50 Hz
VAR = 0.9952 × WATT
VA = 0.9978 × WATT
VAR = 0.9997 × WATT
VA = 0.9977 × WATT
Line Frequency = 60 Hz
VAR = 0.9949 × WATT
VA = 1.0015 × WATT
VAR = 0.9999 × WATT
VA = 1.0015 × WATT
Integrator
Off
Off
On
On
Rev. A | Page 72 of 144
ENERGY MEASUREMENT INTERRUPTS
The energy measurement part of the ADE7566/ADE7569/
ADE7166/ADE7169 has its own interrupt vector for the 8052
core, Vector Address 0x004B (see the Interrupt Vectors section).
The bits set in the Interrupt Enable 1 SFR (MIRQENL, 0xD9),
Interrupt Enable 2 SFR (MIRQENM, 0xDA), and Interrupt
Enable 3 SFR (MIRQENH, 0xDB) enable the energy
measurement interrupts that are allowed to interrupt the 8052
core. If an event is not enabled, it cannot create a system
interrupt.
The ADE interrupt stays active until the status bit that has created
the interrupt is cleared. The status bit is cleared when a zero is
written to this register bit.