71M6511 Datasheet, PDF (71/95 Pages) Teridian Semiconductor Corporation – Single-Phase Energy Meter IC

71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
CE
Address
Name
0x28
PULSE_SLOW
0x29
PULSE_FAST
0x2D
0x36
0x37
WRATE
SUM_PRE
EXT_PULSE
0x3C
PULSE_WIDTH
0x26
APULSEW
0x27
APULSER
Default
1
1
1556
2520
15
50
0
0
Description
When PULSE_SLOW > 0, the pulse generator input is reduced 64x.
When PULSE_FAST > 0, the pulse generator input is increased 16x.
These two parameters control the pulse gain factor X (see table below). Allowed
values are either 1 or –1.
X
1.5 * 2² = 6
1.5 * 2⁶ = 96
1.5 * 2^-4 = 0.09375
PULSE_SLOW
-1
-1
1
PULSE_FAST
-1
1
-1
1.5
1 (default)
1 (default)
Kh =
VMAX*IMAX*47.1132 / (In_8*WRATE*N_ACC*X) Wh/pulse (for MUX_DIV = 1).
VMAX*IMAX*36.2409 / (In_8*WRATE*N_ACC*X) Wh/pulse (for MUX_DIV = 2).
PRE_SAMPS * SUM_CYCLES. This variable is also called N_ACC.
Should be 15 or 0. When zero, causes the pulse generators to respond to
WSUM_X and VARSUM_X. Otherwise, the generators respond to values the
MPU places in APULSEW and APULSER.
The maximum pulse width (low-going pulse) is:
(2 * PULSE_WIDTH + 1) * 397µs (for MUX_DIV = 1)
(2 * PULSE_WIDTH + 1) * 305µs (for MUX_DIV = 2)
0 is a legitimate value.
Wh pulse generator input, to be updated by the MPU when using external pulse
generation (see DIO_PW bit). The output pulse rate is:
APULSEW * F_S * 2^-32 * WRATE * 2^-14
This input is buffered and can be updated by the MPU during a computation in-
terval. The change will take effect at the beginning of the next interval.
VARh pulse generator input to be updated by the MPU when using external
pulse generation (see DIO_PV bit). The output pulse rate is:
APULSER * F_S*2^-32 * WRATE * 2^-14
This input is buffered and can be updated by the MPU during a computation in-
terval. The change will take effect at the beginning of the next interval.
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