CS5490 datasheet(51/57 Pages) CIRRUS

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CS5490

DS982F3

6.6.54 Temperature Offset (TOFF) – Page 16, Address 55

Default = 0xD5 3998

-128.0

value128.0 (°C), with the binary point to the right of bit 16.

perature Sensor Calibration on page 54 for more information.

6.6.55 Calibration Scale (Scale) – Page18, Address 63

Default = 0x4C CCCC (0.6)

The Scale register is used in the gain calibration to set the level of calibrated results of I-channel RMS. During

gain calibration, the IRMS results register is divided into the Scale register. The quotient is put into the IGAIN

 value  1.0, with the binary point to the right of

the MSB. Negative values are not used.

6.6.56 Zero-crossing Number (ZXNUM) – Page 0, Address 55

Default = 0x00 0064 (100)

ZXNUM is the number of zero crossings used for line frequency measurement. It is an integer in the range of

1 to 8,388,607. Zero should not be used.

6.6.57 V-channel Zero-crossing Threshold (VZXLEVEL) – Page 18, Address 58

Default = 0x10 0000 (0.125)

VZXLEVEL is the level that the peak instantaneous voltage must exceed for the zero-crossing detection to

function. 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. Negative values are not used.

6.6.58 I-channel Zero-crossing Threshold (IZXLEVEL) – Page 18, Address 24

Default = 0x10 0000 (0.125)

IZXLEVEL is the level that the peak instantaneous current must exceed for the zero-crossing detection to func-

tion. 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. Negative values are not used.

MSB

LSB

-(27)26

.....

2-10

2-11

2-12

2-13

2-14

2-15

2-16

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

223

222

221

220

219

218

217

216

.....

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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