Cs5490, 45 total reactive power (q, Page 16, address 31 – Cirrus Logic CS5490 User Manual
Page 49: 46 dc offset for current (i, Page 16, address 32, 47 dc offset for voltage (v, Page 16, address 34, 48 gain for current (i, Page 16, address 33
CS5490
DS982F3
49
6.6.45 Total Reactive Power (Q
SUM
)
–
Page 16, Address 31
Default = 0
Q
SUM
= Q
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.
6.6.46 DC Offset for Current (I
DCOFF
) – Page 16, Address 32
Default = 0
DC offset registers I
DCOFF
are initialized to zero on reset. During DC offset calibration, selected registers are
written with the inverse of the DC offset measured. The application program can also write the DC offset reg-
ister values. 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.
6.6.47 DC Offset for Voltage (V
DCOFF
)
–
Page 16, Address 34
Default = 0
DC offset registers V
DCOFF
are initialized to zero on reset. During DC offset calibration, selected registers are
written with the inverse of the DC offset measured. The application program can also write the DC offset reg-
ister values. It 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.
6.6.48 Gain for Current (I
GAIN
)
–
Page 16, Address 33
Default = 1.0
Gain register I
GAIN
is initialized to 1.0 on reset. During gain calibration, the I
GAIN
register is written with the
multiplicative inverse of the gain measured. This is an unsigned fixed-point value in the range of
0
value 4.0, with the binary point to the right of the second 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
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
MSB
LSB
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
.....
2
-16
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22