CS5461A-IS 查看數據表（PDF） - Cirrus Logic

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CS5461A-IS

Single Phase, Bi-directional Power/Energy IC

Cirrus Logic 

CS5461A

6.11 Current and Voltage AC Offset Register ( VACoff , IACoff )

Address: 16 (Current AC Offset); 17 (Voltage AC Offset)

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

Default = 0x000000

The AC Offset Registers (VACoff, IACoff) are initialized to zero on reset, allowing for uncalibrated normal operation.

AC Offset Calibration updates these registers. This sequence lasts approximately (6N + 30) ADC cycles (where

N is the value of the Cycle Count Register). DRDY will be asserted at the end of the calibration. These values

may be read and stored for future system AC offset compensation. The value is represented in two's comple-

ment notation and in the range of -1.0 ≤ VACoff, IACoff < 1.0, with the binary point to the right of the MSB.

6.12 PulseRateE3 Register

Address: 18

MSB

LSB

218 217 216 215 214 213 212 211 .....

21

20

2-1

2-2

2-3

2-4

2-5

Default = 0xFA0000 = 32000.00 Hz

PulseRateE3 sets the frequency of the E3 pulses. The register’s smallest valid frequency is 2-4 with 2-5 incre-

mental steps. A pulse rate higher than (MCLK/K)/8 will result in a pulse rate setting of (MCLK/K)/8. The value

is represented in unsigned notation, with the binary point to the right of bit #5.

6.13 Temperature Register ( T )

Address: 19

MSB

LSB

-(27) 26

25

24

23

22

21

20

..... 2-10 2-11 2-12 2-13 2-14 2-15 2-16

T contains measurements from the on-chip temperature sensor. Measurements are performed during continu-

ous conversions, with the default the Celsius scale (oC). The value is represented in two's complement notation

and in the range of -128.0 ≤ T < 128.0, with the binary point to the right of the eighth MSB.

6.14 System Gain Register ( SYSGain )

Address: 20

MSB

LSB

-(21) 20

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

Default = 0x500000 = 1.25

System Gain (SYSGain) determines the one’s density of the channel measurements. Small changes in the mod-

ulator due to temperature can be fine adjusted by changing the system gain. The value is represented in two's

complement notation and in the range of -2.0 < SYSGain < 2.0, with the binary point to the right of the second

MSB.

30

DS661F2

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