Cs5490, 17 no load threshold (load, Page 16, address 58 – Cirrus Logic CS5490 User Manual
Page 42: 18 sample count (samplecount), Page 16, address 51, 19 cycle count (cyclecount), Page 18, address 62, 20 filter settling time for conversion startup (t, Page 16, address 57
CS5490
42
DS982F3
6.6.17 No Load Threshold (Load
MIN
)
–
Page 16, Address 58
Default = 0x00 0000
Load
MIN
is used to set the no-load threshold for the anti-creep function.
When the magnitudes of P
SUM
and Q
SUM
are less than Load
MIN
, P
SUM
and Q
SUM
are forced to zero. When
the magnitude of S
SUM
is less than Load
MIN
, S
SUM
is forced to zero.
Load
MIN
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. Negative values are not used.
6.6.18 Sample Count (SampleCount)
–
Page 16, Address 51
Default = 0x00 0FA0 (4000)
Determines the number of output word rate (OWR) samples to use in calculating low-rate results.
SampleCount (N) is an integer in the range of 100 to 8,388,607. Values less than 100 should not be used.
6.6.19 Cycle Count (CycleCount)
–
Page 18, Address 62
Default = 0x00 0064 (100)
Determines the number of half-line cycles to use in calculating low-rate results when the CS5490 is in Line-cy-
cle Synchronized Averaging mode.
CycleCount is an integer in the range of 1 to 8,388,607. Zero should not be used.
6.6.20 Filter Settling Time for Conversion Startup (T
SETTLE
) – Page 16, Address 57
Default = 0x00 001E (30)
Sets the number of output word rate (OWR) samples that will be used to allow filters to settle at the beginning
of Conversion and Calibration commands.
This is an integer in the range of 0 to 16,777,215 samples.
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
0
2
22
2
21
2
20
2
19
2
18
2
17
2
16
.....
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSB
LSB
0
2
22
2
21
2
20
2
19
2
18
2
17
2
16
.....
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSB
LSB
2
23
2
22
2
21
2
20
2
19
2
18
2
17
2
16
.....
2
6
2
5
2
4
2
3
2
2
2
1
2
0