71m6521be Maxim Integrated Products, Inc., 71m6521be Datasheet - Page 78

• Manufacturer Part Number: 71m6521be
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

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.
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.
Page: 78 of 97
CECONFIG
Address
0x1040
[15:8]
[bit]
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
CE
MAGNETIC TAMPER
NEUTRAL TAMPER
CECONFIG
PULSE_SLOW
PULSE_FAST
IB_SHUNT
IA_SHUNT
Name
SAG_CNT
FREQSEL
Name
--
Default
0x5000
© 2005-2008 TERIDIAN Semiconductor Corporation
Default
(0x50)
80
0
0
0
0
0
0
0
0
Description
See description of CECONFIG below
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.
These two parameters control the pulse gain factor X (see table below).
Allowed values are either 1 or 0. Default is 0 (X = 6).
1.5 * 2
1.5 * 2
1.5 * 2
-4
1.5
= 0.09375
X
6
2
= 96
= 6
PULSE_SLOW
Description
0
0
1
1
Energy Meter IC
71M6521BE
PULSE_FAST
DATA SHEET
0
1
0
1
JANUARY 2008
V1.0