Datasheet

71M6515H
Energy Meter IC
DATA SHEET
JULY 2011
Page: 34 of 60 © 2005−2011 Teridian Semiconductor Corporation 1.6
A Maxim Integrated Products Brand
At high pulse rates, duty cycle is 50%. At rates less than 1/(2*PWmax), the negative going pulse width is PWmax. The
allowed range is 0 to 2
31
-1.
The pulse width for the PULSE3 and PULSE4 outputs is always at a 50% duty cycle.
The initial voltage level of the pulse pins is defined with the PULSE_INIT pin.
Value in Pulse
Source Register
(hex) (dec)
Name Description
0x00
0
WSUM
The signed sum: W0SUM + W1SUM + W2SUM
0x01
1
WASUM
The sum of Wh samples from individual wattmeter elements.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 Wh
0x02
2
WBSUM
0x03
3
WCSUM
0x04
4
VARSUM
The signed sum: VAR0SUM + VAR1SUM + VAR2SUM
0x05
5
VARASUM
The sum of VARh samples from individual wattmeter elements.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 VARh
0x06
6
VARBSUM
0x07
7
VARCSUM
0x08
8
VASUM
The sum of VAh samples from individual samples.
0x09
9
VAASUM
The sum of VAh samples from individual wattmeter elements.
LSB = 9.4045*10
-13
VMAX IMAX / In_8 VAh
0x0A
10
VABSUM
0x0B
11
VACSUM
0x0C 12 INSQSUM
The sum of the square of the calculated neutral current.
∑
++ .)(
2
210
III
LSB = 9.4045*10
-13
IMAX
2
/ In_8
2
A
2
h
0x0D
13
IASQSUM
The sum of squared current samples from each element.
LSB = 9.4045*10
-13
IMAX
2
/ In_8
2
A
2
h
0x0E
14
IBSQSUM
0x0F
15
ICSQSUM
Table 6: Pulse Sources Defined by the PULSE_SRCS Register (1/2)