SA9103ESA Ver la hoja de datos (PDF) - South African Micro Electronic Systems

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SA9103ESA

SINGLE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH SERIAL INTERFACE

South African Micro Electronic Systems 

SA9103E

By adapting the "Read/Reset" rate to the line current the accuracy of the measurement

can be achieved down to lowest signal levels.

Read, Reset and Read/Reset of integrator for active energy

RD

RD

RE S

RE S

RD/

RE S

DR -0 0 9 2 0

RD RE S

ST ART

BI T

S T OP

BI T

The register access codes which can be written to the SA9103E via the serial

communications port are shown in the table below:

REGISTER

Active

READ

$01

RESET

$02

READ-RESET

$03

From the two bytes of data output by the device, the value for the register may be

derived as shown:

Register value = (first byte * 256) + second byte

The most significant bit of the 16 bit energy register is an indication fo the direction

of the energy flow (0 = positive, 1 = negative)

Data on SOUT

8 9 10 11 12 13 14 15

FIRST BYTE

DR-00923

sames

01234567

SECOND BYTE

7/14

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