Datasheet

71M6515H
Energy Meter IC
DATA SHEET
JULY 2011
Page: 35 of 60 © 2005−2011 Teridian Semiconductor Corporation 1.6
A Maxim Integrated Products Brand
Value in Pulse
Source Register
(hex) (dec)
Name Description
0x10
16
VASQSUM
The sum of squared voltage samples from each element.
LSB = 9.4045*10
-13
VMAX
2
V
2
h
0x11
17
VBSQSUM
0x12
18
VCSQSUM
0x13
19
WSUM_I
Imported Energy: W0SUM_I + W1SUM_I + W2SUM_I
0x14
20
WASUM_I
Imported energy from individual wattmeter elements. Never negative.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 Wh
0x15
21
WBSUM_I
0x16
22
WCSUM_I
0x17 23 VARSUM_I
Imported VARh:
VAR0SUM_I + VAR1SUM_I + VAR2SUM_I
0x18
24
VARASUM_I
Exported reactive energy from individual wattmeter elements. Never negative.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 VARh
0x19
25
VARBSUM_I
0x1A
26
VARCSUM_I
0x1B
27
WSUM_E
Exported Energy: W0SUM_E + W1SUM_E + W2SUM_E
0x1C
28
WASUM_E
Exported energy from individual wattmeter elements. Never negative.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 Wh
0x1D
29
WBSUM_E
0x1E
30
WCSUM_E
0x1F 31 VARSUM_E
Exported VARh:
VAR0SUM_E + VAR1SUM_E + VAR2SUM_E
0x20
32
VARASUM_E
Exported reactive energy from individual wattmeter elements. Never negative.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 VARh
0x21
33
VARBSUM_E
0x22
34
VARCSUM_E
0x23 35 Internal (CE)
Connects the pulse generator to the WSUM or VARSUM values internally
calculated by the CE. Not selectable for PULSE3 and PULSE4 pulse generators.
0x24 36
External
(host)
Indicates that the host will provide values in the APULSER, APULSEW,
APULSE3, and APULSE4 registers and that the pulse generator should be up-
dated on the next READY interrupt..
Table 6: Pulse Sources Defined by the PULSE_SRCS Register (2/2)
WRATE (0x2D)
This register controls the rate of the pulse generation for the PULSEW, PULSER, PUSE3 and PULSE4 output pins. The
inverse pulse rate, expressed as Wh per pulse is:
PulseWh
XWRATECYCLESSUMIn
IMAXVMAX
Kh /5757.1
_8_ ⋅⋅⋅
=
(X = value formed by PULSE_SLOW and
PULSE_FAST bits in the CONFIG register)