參數(shù)資料
型號(hào): 71M6521DE-IMR/F
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, QCC68
封裝: LEAD FREE, LQFN-68
文件頁(yè)數(shù): 86/103頁(yè)
文件大?。?/td> 1691K
代理商: 71M6521DE-IMR/F
71M6521DE/71M6521FE
Energy Meter IC
DATA SHEET
OCTOBER 2010
v1.1
2005-2010 Teridian Semiconductor Corporation
Page: 83 of 103
A Maxim Integrated Products Brand
19-5370; 10/10
CECONFIG
[bit]
Name
Default
Description
[15:8]
SAG_CNT
80
(0x50)
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.
[7]
--
0
Unused
[6]
FREQSEL
0
Selected phase for frequency monitor (0 = A, 1 = B).
[5]
EXT_PULSE
1
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.
[4]
--
0
Unused
[3]
IB_SHUNT
0
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.
[2]
IA_SHUNT
0
When 1, the current gain of channel A is increased by 8.
[1]
PULSE_FAST
0
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).
X
PULSE_SLOW
PULSE_FAST
1.5 * 2
2 = 6
0
1.5 * 2
6 = 96
0
1
1.5 * 2
-4 = 0.09375
1
0
1.5
1
[0]
PULSE_SLOW
0
CE TRANSFER VARIABLES
When the MPU receives the XFER_BUSY interrupt, it knows that fresh data is available in the transfer variables. The transfer
variables can be categorized as:
1.
Fundamental energy measurement variables
2.
Instantaneous (RMS) values
3.
Other measurement parameters
4.
Pulse generation variables
5.
Current shunt variables
6.
Calibration parameters
Fundamental Energy Measurement Variables
The table below describes each transfer variable for fundamental energy measurement. All variables are signed 32 bit
integers. Accumulated variables such as WSUM are internally scaled so they have at least 2x margin before overflow when the
integration time is 1 second. Additionally, the hardware will not permit output values to ‘fold back’ upon overflow.
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