CS5463-IS View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5463-IS

Single Phase, Bi-directional Power/Energy IC

Cirrus Logic 

CS5463

6.1.6 Instantaneous Current, Voltage, and Power Registers ( I , V , P )

Address: 7 (Instantaneous Current); 8 (Instantaneous Voltage); 9 (Instantaneous Power)

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

I and V contain the instantaneous measured values for current and voltage, respectively. The instantaneous

voltage and current samples are multiplied to obtain Instantaneous Power (P). The value is represented in two's

complement notation and in the range of -1.0 ≤ I, V, P < 1.0, with the binary point to the right of the MSB.

6.1.7 Active (Real) Power Register ( PActive )

Address: 10 (Active Power)

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

The instantaneous power is averaged over each computation cycle (N conversions) to compute Active Power

(PActive). The value will be within in the range of -1.0 ≤ PActive< 1.0. The value is represented in two's complement

notation, with the binary point to the right of the MSB.

6.1.8 RMS Current & Voltage Registers ( IRMS , VRMS )

Address: 11 (IRMS); 12 (VRMS)

MSB

LSB

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

..... 2-18 2-19 2-20 2-21 2-22 2-23 2-24

IRMS and VRMS contain the Root Mean Square (RMS) values of I and V, calculated each computation cycle. The

value is represented in unsigned binary notation and in the range of 0.0 ≤ IRMS, VRMS < 1.0, with the binary point

to the left of the MSB.

6.1.9 Epsilon Register ( ε )

Address: 13

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 = 0x01999A = 0.0125 sec

Epsilon (ε) is the ratio of the input line frequency to the sample frequency of the ADC (See Section 5.4 Perform-

ing Measurements on page 16). Epsilon is either written to the register, or measured during conversions. The

value is represented in two's complement notation and in the range of -1.0 ≤ ε < 1.0, with the binary point to the

right of the MSB. Negative values have no significance.

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DS678F2

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