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
ST AR T
BI T
D R -0 0 9 2 0
RD
RE S
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
0
1
2
3
4
5
6
7
FIRST BYTE
DR-00923
SECOND BYTE
sames
7/14
SAMES [ SAMES ]
