cs5460 Cirrus Logic, Inc., cs5460 Datasheet - Page 23
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cs5460
Manufacturer Part Number
cs5460
Description
Single Phase Bi-directional Power/energy Ic
Manufacturer
Cirrus Logic, Inc.
Datasheet
1.CS5460.pdf
(34 pages)
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4.4 Cycle Count Register
4.5 Pulse-Rate Register
4.6 I,V,P,E Signed Output Register Results
4.7 I
DS279PP5
SIGN
MSB
MSB
MSB
MSB
2
2
2
23
18
-1
Address: RA[4:0]* = 0x05
Default** = 4000
The Cycle Count Register determines the length of an energy and RMS conversion. A conversion cycle is de-
rived from (MCLK/K)/(1024 N) where MCLK is master clock, K is clock divider, and N is cycle count. N must be
greater than 10 for I
Address: RA[4:0]* = 0x06
Default** = 32000.00Hz
The Pulse-Rate Register determines the frequency of the train of pulses output on the EOUT pin. Each EOUT
pulse represents a predetermined magnitude of energy.The register’s smallest valid value is 2
2
Address: RA[4:0]* = 0x07 - 0x0A
Access: Read Only
The 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
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.
Address: RA[4:0]* = 0x0B - 0x0C
Access: Read Only
The Unsigned Registers contain the last value of the calculated results of I
range of 0.0
left of the MSB. I
-5
RMS
increments.
2
2
2
2
, V
22
17
-1
-2
RMS
2
2
2
2
21
16
-2
-3
Unsigned Output Register Results
I
RMS
I, V, P, E
RMS
2
2
,V
2
2
RMS
20
15
-3
-4
RMS
and V
, V
2
2
2
RMS
2
RMS
1.0. The value is represented in two's complement notation, with the binary point
19
14
-4
-5
1.0. The value is represented in binary notation, with the binary point place to the
and energy calculations to be performed.
are output result registers which contain unsigned values.
2
2
2
2
18
13
-5
-6
2
2
2
2
17
12
-6
-7
2
2
2
2
16
11
-7
-8
.....
.....
.....
.....
2
2
2
2
-17
-18
6
1
2
2
2
2
-18
-19
5
0
RMS
2
2
2
2
-19
-20
-1
and V
4
2
2
RMS
2
2
-20
-21
-2
3
. The results are in the
2
2
2
2
-21
-22
-3
2
-4
but can be in
CS5460
2
2
2
2
-22
-23
-4
1
LSB
LSB
LSB
LSB
2
2
2
2
-23
-24
-5
0
23