71M6533 Datasheet, PDF (94/124 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6533/71M6534 Data Sheet
FDS_6533_6534_004
The EXT_TEMP bit enables temperature compensation by the MPU, when set to 1. When 0, internal (CE)
temperature compensation is enabled.
I0_SHUNT, I1_SHUNT and I2_SHUNT can configure their respective current inputs to accept shunt resistor
sensors. In this case the CE provides an additional gain of 8 to the selected current input. WRATE may
need to be adjusted based on the values In_SHUNT.
The CE pulse generator can be controlled by either the MPU (external) or CE (internal) variables. Control is by
the MPU if EXT_PULSE = 1. In this case, the MPU controls the pulse rate by placing values into APULSEW
and APULSER. By setting EXT_PULSE = 0, the CE controls the pulse rate based on WSUM and VARSUM.
The 71M6533 Demo Code creep function halts both internal and external pulse generation.
Table 53: CECONFIG Bit Definitions
CECONFIG
[bit]
[20]
[19]
[18]
[17]
Name
SAG_MASK2
SAG_MASK1
SAG_MASK0
SAG_INT
[16]
EXT_TEMP
[15:8]
SAG_CNT
[7]
FREQSEL1
[6]
FREQSEL0
[5]
EXT_PULSE
[4]
IC_SHUNT
[3]
IB_SHUNT
[2]
IA_SHUNT
[1]
PULSE_FAST
Default Description
0
0
0
0
0
80
(0x50)
0
0
1
0
0
0
0
When 1, enables sag interrupt based on phase C.
When 1, enables sag interrupt based on phase B.
When 1, enables sag interrupt based on phase A.
When 1, activates YPULSE/DIO8 output when a sag is de-
tected (see also 1.4.7).
When 1, enables temperature compensation by the MPU.
When 0, internal (CE) temperature compensation is enabled.
The number of consecutive voltage samples below SAG_THR
before a sag alarm is declared. The maximum value is 255.
SAG_THR is at address 0x24.
The combination of FREQSEL1 and FEQSEL2 selects the
phase to be used for the frequency monitor, the phase-to-
phase lag calculation and for the zero crossing counter
(MAINEDGE_X).
FREQ FREQ Phase
SEL1 SEL0 Se-
lected
Phases Used for Voltage
Phase Lag Calculation
PH_AtoB_X
PH_AtoC_X
0
0
A
A-B
A-C
0
1
B
B-C
B-A
1
0
C
C-A
C-B
1
1
Not allowed
When zero, causes the pulse generators to respond to internal
data (WPULSE = WSUM_X, RPULSE = VARSUM_X,
XPULSE = WSUM_X). Otherwise, the generators respond to
values the MPU places in APULSEW and APULSER.
When 1, the current gain of channel C is increased by 8. The
gain factor controlled by In_SHUNT is referred to as In_8
throughout this document.
When 1, the current gain of channel B is increased by 8.
When 1, the current gain of channel A is increased by 8.
When PULSE_FAST = 1, the pulse generator input is increased
16x. When PULSE_SLOW = 1, the pulse generator input is
reduced by a factor of 64. These two parameters control the
pulse gain factor X (see table below). Allowed values are ei-
94
© 2007-2009 TERIDIAN Semiconductor Corporation
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