CS5460A
5.5 Pulse-Rate Register
Address: 6
MSB
LSB
18
17
16
15
14
13
12
11
1
0
-1
-2
-3
-4
-5
.....
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Default** = 32000.00Hz
The Pulse-Rate Register determines the frequency of the train of pulses output on the EOUT pin. Each EOUT
-4
pulse represents a predetermined magnitude of real (billable) energy. The register’s smallest valid value is 2
but can be in 2 increments.
-5
5.6 I,V,P,E Signed Output Register Results
Address: 7 - 10
MSB
LSB
0
-1
-2
-3
-4
-5
-6
-7
-17
-18
-19
-20
-21
-22
-23
.....
-(2 )
2
2
2
2
2
2
2
2
2
2
2
2
2
2
These signed registers contain the last value of the measured results of I, V, P, and E. The results are in the
range of -1.0 ≤ I, V, P, E < 1.0. The value is represented in two's complement notation, with the binary point
place to the right of the MSB (which is the sign bit). I, V, P, and E are output results registers which contain
signed values. Note that the I, V, and P Registers are updated every conversion cycle, while the E Register is
only updated after each computation cycle. The numeric format of this register is two’s complement notation.
5.7 I
, V
Unsigned Output Register Results
RMS
RMS
Address: 11,12
MSB
LSB
-1
-2
-3
-4
-5
-6
-7
-8
-18
-19
-20
-21
-22
-23
-24
.....
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
These unsigned registers contain the last value of the calculated results of I
and V
. The results are in
RMS
RMS
the range of 0.0 ≤ I
,V
< 1.0. The value is represented in binary notation, with the binary point place to
are output result registers which contain unsigned values.
RMS
RMS RMS
the left of the MSB. I
and V
RMS
5.8 Timebase Calibration Register
Address: 13
MSB
LSB
0
-1
-2
-3
-4
-5
-6
-7
-17
-18
-19
-20
-21
-22
-23
.....
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Default** = 1.000
The Timebase Calibration Register is initialized to 1.0 on reset, allowing the device to function and perform com-
putations. The register can be loaded with the clock frequency error to compensate for a gain error caused by
the crystal/oscillator tolerance. The value is in the range 0.0 ≤ TBC < 2.0.
47
CIRRUS [ CIRRUS LOGIC ]
