Cs5480, 68 dc offset for current (i1, 69 dc offset for voltage (v1 – Cirrus Logic CS5480 User Manual
Page 60: 70 gain for current (i1, 71 gain for voltage (v1, 72 average active power offset (p1
CS5480
60
DS980F3
6.6.68 DC Offset for Current (I1
DCOFF
, I2
DCOFF
)
–
Page 16, Address 32, 39
Default = 0x00 0000
DC offset registers I1
DCOFF
and I2
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 register values. These are two's complement values in the range of -1.0
value1.0, with the binary
point to the right of the MSB.
6.6.69 DC Offset for Voltage (V1
DCOFF
, V2
DCOFF
)
–
Page 16, Address 34, 41
Default = 0x00 0000
DC offset registers V1
DCOFF
and V2
DCOFF
are initialized to zero on reset. During DC offset calibration, select-
ed registers are written with the inverse of the DC offset measured. The application program can also write
the DC offset register values. These are two's complement values in the range of -1.0
value1.0, with the
binary point to the right of the MSB.
6.6.70 Gain for Current (I1
GAIN
, I2
GAIN
)
–
Page 16, Address 33, 40
Default = 0x40 0000 (1.0)
Gain registers I1
GAIN
and I2
GAIN
are initialized to 1.0 on reset. During gain calibration, selected registers are
written with the multiplicative inverse of the gain measured. These are unsigned, fixed-point values in the
range of 0
value4.0, with the binary point to the right of the second MSB.
6.6.71 Gain for Voltage (V1
GAIN
, V2
GAIN
)
–
Page 16, Address 35, 42
Default = 0x40 0000 (1.0)
Gain registers V1
GAIN
and V2
GAIN
are initialized to 1.0 on reset. During gain calibration, selected register are
written with the multiplicative inverse of the gain measured. These are unsigned fixed-point values in the
range of 0
value4.0, with the binary point to the right of the second MSB.
6.6.72 Average Active Power Offset (P1
OFF
, P2
OFF
)
–
Page 16, Address 36, 43
Default = 0x00 0000
Average Active Power offset P1
OFF
(P2
OFF
) is added to averaged power to yield P1
AVG
(P2
AVG
) register re-
sults. It can be used to reduce systematic energy errors. These are two's complement values 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
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
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
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