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71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
The CE is initialized by the MPU using CECONFIG ( CESTATE ) . This register contains in packed form the control bits for
SAG_CNT, FREQSEL , NEUTRAL_TAMPER , IB_SHUNT , IA_SHUNT , PULSE_SLOW , and PULSE_FAST .
CE
Address
0x1040
Name
CECONFIG
Default
0x5000
Description
See description of CECONFIG below
The significance of the bits in CECONFIG is shown in the table below:
IA_SHUNT and/or IB_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 of
IA_ SHUNT and IB_ SHUNT . Whenever IA_SHUNT or IB_SHUNT are set to 1, In_8 (in the equation for Kh) is assigned a value of
8.
The CE pulse generator is controlled only by the CE (internal) variables.
Note: The 6521BE Demo Code creep function halts both internal and external pulse generation.
CECONFIG
[bit]
[15:8]
[7]
[6]
[5]
[4]
[3]
[2]
Name
SAG_CNT
--
FREQSEL
NEUTRAL TAMPER
MAGNETIC TAMPER
IB_SHUNT
IA_SHUNT
Default
80
(0x50)
0
0
0
0
0
0
Description
Number of consecutive voltage samples below SAG_THR before a sag
alarm is declared. The maximum value is 255. SAG_THR is at address
0x14.
Reserved
Selected phase for frequency monitor (0 = A, 1 = B).
Alert CE that neutral line tampering has been detected.
Alert CE that magnetic tampering has been detected.
When 1, the current gain of channel B 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 A is increased by 8.
When PULSE_SLOW = 1, the pulse generator input is reduced by a factor of
64. When PULSE_FAST = 1, the pulse generator input is increased 16x.
1.5 * 2 = 6
[1]
PULSE_FAST
0
These two parameters control the pulse gain factor X (see table below).
Allowed values are eithe   r 1 or 0. Default is 0 ( X = 6).
X
PULSE_SLOW
PULSE_FAST
2
0
0
1.5 * 2 = 96
1.5 * 2 = 0.09375
[0]
PULSE_SLOW
0
-4
6
0
1
1
0
1.5
1
1
Page: 78 of 97
? 2005-2008 TERIDIAN Semiconductor Corporation
V1.0
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