22 fundamental active power register ( p, Cs5463 – Cirrus Logic CS5463 User Manual
Page 33
CS5463
DS678F3
33
6.1.20 Control Register ( Ctrl )
Register Address: 28
Default = 0x000000
STOP
Terminates the auto-boot sequence.
0 = Normal (default)
1 = Stop sequence
INTOD
Converts INT output pin to an open drain output.
0 = Normal (default)
1 = Open drain
NOCPU
Saves power by disabling the CPUCLK pin.
0 = Normal (default)
1 = Disables CPUCLK
NOOSC
Saves power by disabling the crystal oscillator.
0 = Normal (default)
1 = Disabling oscillator circuit
6.1.21 Harmonic Active Power Register ( P
H
)
Address: 29
The Harmonic Active Power (P
H
) is calculated by subtracting the Fundamental Active Power from the Active
(Real) Power. The value is represented in two's complement notation and in the range of -1.0
P
H
1.0, with
the binary point to the right of the MSB.
6.1.22 Fundamental Active Power Register ( P
F
)
Address: 30
The Fundamental Active Power (P
F
) is calculated by performing a discrete Fourier transform (DFT) at the rele-
vant frequency on the V and I channels. The results are multiplied to yield fundamental power. The value is rep-
resented in two's complement notation and in the range of -1.0
P
H
1.0, with the binary point to the right of
the MSB.
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
STOP
7
6
5
4
3
2
1
0
INTOD
NOCPU
NOOSC
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
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