CS5464 datasheet(36/46 Pages) CIRRUS

36 / 46 page

CS5464

DS682F3

8.3.9 Cycle Count (N) – Address: 19

Default = 4000

Determines the number of output word rate (OWR) samples to use in calculating low-rate results. Cycle Count

(N) is an integer in the range of 10 to 8,388,607. Values less than 10 should not be used.

8.3.10 Channel Select Level (Ichanlevel ) – Address: 18

Default = 1.02 (minimum difference = 2%)

Sets the hysteresis level for energy channel selection. If the most positive value of P1AVG and P2AVG (I1RMS

and I2RMS) is greater than IchanLEVEL multiplied by the least-positive value, and is also greater than

IchanMIN, the channel associated with the most-positive value will be used. If not, the previous channel

selection will remain. IchanLEVEL is an unsigned fixed-point value in the range of 0  value  2.0, with the bi-

nary point to the left of the MSB. A value of 1.0 or less

indicates no hysteresis will be used.

8.3.11 Channel Select Minimum Amplitude (EMIN or IrmsMIN ) – Address: 24

Default = 0.003

Sets the minimum level for energy channel selection. If the most positive value of P1AVG and P2AVG (I1RMS and

I2RMS) is less than IchanMIN then the previous channel selection will remain in use. 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. Negative values are not

used.

8.3.12 Wideband Reactive Power (Q1WB , Q2WB )

Address: 20 (Q1WB), 21 (Q2WB)

Wideband reactive power is calculated using vector subtraction. (See Section 4.8 Power and Energy Results

on page 16). The value is signed, but has a range of 0

 value  1.0. The binary point is to the right of the MSB.

MSB

LSB

0222

221

220

219

218

217

216

.....

MSB

LSB

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

-(20)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

-(20)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

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