CS5480 datasheet(49/70 Pages) CIRRUS

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CS5480

DS980F3

6.6.18 Automatic Channel Select Level (IchanLEVEL ) – Page 16, Address 50

Default = 0x82 8F5C (1.02 or 2% minimum difference)

Sets the hysteresis level for automatic energy channel selection.

The channel select level register sets the hysteresis level for automatic 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.

The value in this register is an unsigned fixed-point value in the range of 0

value2.0, with the binary point

to the right of the MSB. A value of 1.0 or less indicates no hysteresis will be used.

6.6.19 Current Channel Minimum Amplitude (PMIN (IRMSMIN)) – Page 16, Address 56

Default = 0x00 624D (0.003)

Sets the minimum level for automatic energy channel selection.

The PMIN (IRMSMIN) register sets the minimum level for automatic energy channel selection. If the most-pos-

itive values of P1AVG (or I1RMS) register and P2AVG (or I2RMS) register is less than PMIN (IRMSMIN), the pre-

vious 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.

6.6.20 No Load Threshold (LoadMIN) – Page 16, Address 58

Default = 0x00 0000

LoadMIN is used to set the no-load threshold for the anti-creep function.

When the magnitudes of PSUM and QSUM are less than LoadMIN, PSUM and QSUM are forced to zero. When

the magnitude of SSUM is less than LoadMIN, SSUM is forced to zero.

LoadMIN 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.

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

CS5480 数据表(PDF) 49 Page - Cirrus Logic

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