Cs5490, 33 active power (p, Page 16, address 5 – Cirrus Logic CS5490 User Manual
Page 46: 34 rms current (i, Page 16, address 6, 35 rms voltage (v, Page 16, address 7, 36 reactive power (q, Page 16, address 14
CS5490
46
DS982F3
6.6.33 Active Power (P
AVG
) – Page 16, Address 5
Default = 0x00 0000
Instantaneous power is averaged over each low-rate interval (SampleCount samples) and then added with
power offset (P
OFF
) to compute active power (P
AVG
).
This is a two's complement value in the range of -1.0
value 1.0, with the binary point to the right of the
MSB.
6.6.34 RMS Current (I
RMS
) – Page 16, Address 6
Default = 0x00 0000
I
RMS
contains the root mean square (RMS) values of I, calculated during each low-rate interval.
This is an unsigned value in the range of 0
value1.0, with the binary point to the left of the MSB.
6.6.35 RMS Voltage (V
RMS
) – Page 16, Address 7
Default = 0x00 0000
V
RMS
contains the root mean square (RMS) value of V, calculated during each low-rate interval.
This is an unsigned value in the range of 0
value1.0, with the binary point to the left of the MSB.
6.6.36 Reactive Power (Q
Avg
) – Page 16, Address 14
Default = 0x00 0000
Reactive power (Q
AVG
) is Q averaged over each low-rate interval (SampleCount samples) and corrected by
Q
OFF
.
This is a two's complement value in the range of -1.0
value 1.0, with the binary point to the right of the
MSB.
MSB
LSB
-(2
0
)
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
.....
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
MSB
LSB
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
.....
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
2
-24
MSB
LSB
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
.....
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
2
-24
MSB
LSB
-(2
0
)
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
.....
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23