Maxim Integrated 71M6541 Manuals

Manuals and User Guides for Maxim Integrated 71M6541. We have 1 Maxim Integrated 71M6541 manual available for free PDF download: User Manual

Maxim Integrated 71M6541 User Manual (76 pages)

Demo Board

Brand: Maxim Integrated | Category: Computer Hardware | Size: 2 MB

Table of Contents
2
Getting Started
5
General
5
Safety and ESD Notes
5
Demo Kit Contents
6
Demo Board Versions
6
Compatibility
6
Suggested Equipment Not Included
6
Demo Board Test Setup
7
Figure 1-1: D6541 REV2.0 Demo Board with Debug Board: Basic Connections
7
Power Supply Setup
8
Cables for Serial Communication
8
Table 1-1: Jumper Settings on Debug Board
8
Table 1-2: Straight Cable Connections
8
Table 1-3: Null-Modem Cable Connections
8
Checking Operation
9
Serial Connection Setup
9
Using the Demo Board
10
Figure 1-2: Hyperterminal Sample Window with Disconnect Button (Arrow)
10
Figure 1-3: Port Speed and Handshake Setup (Left) and Port Bit Setup (Right)
10
Serial Command Language
11
Information Messages
13
Real-Time Clock Con- Trol
14
Trim Control
14
Using the Demo Board for Energy Measurements
17
Adjusting the Kh Factor for the Demo Board
17
Adjusting the Demo Boards to Different SHUNT Resistors
17
Using the Pre-Amplifier
17
Using Current Transformers (Cts)
17
Implementing a Single-Phase 3-Wire Meter (EQU 1)
17
Adjusting the Demo Boards to Different Voltage-Dividers
17
Calibration Parameters
18
General Calibration Procedure
18
Calibration Macro File
19
Updating the Demo Code (Hex File)
19
Figure 1-4: Typical Calibration Macro File
19
Table 1-4: CE RAM Locations for Calibration Constants
19
Updating Calibration Data in Flash or EEPROM
20
Loading the Code for the 71M6541 into the Demo Board
20
Figure 1-5: Emulator Window Showing Reset and Erase Buttons (See Arrows)
21
Figure 1-6: Emulator Window Showing Erased Flash Memory and File Load Menu
21
The Programming Interface of the 71M6541
22
Table 1-5: Flash Programming Interface Signals
22
Demo Code
23
Demo Code Description
23
Important MPU Addresses
23
Table 1-6: MPU XRAM Locations
24
Table 1-7: Bits in the MPU Status Word
29
LSB Values in CE Registers
30
Calculating IMAX and Kh
30
Table 1-8: CE Registers and Associated LSB Values
30
Determining the Type of 71M6X0X
31
Table 1-9: IMAX for Various Shunt Resistance Values and Remote Sensor Types
31
Communicating with the 71M6X0X
32
Bootloader Feature
32
Table 1-10: Identification of 71M6X0X Remote Sensor Types
32
Application Information
34
Sensor Connections and Equations
34
Sensor Wiring
34
Figure 2-1: Shunt Connections
34
Single-Phase Two-Wire (EQU 0)
35
Figure 2-2: Single-Phase Two-Wire Meter with Shunt Sensor
35
Figure 2-3: Single-Phase Two-Wire Meter with Two Shunt Sensors
35
Single-Phase Three-Wire (EQU 1)
36
Figure 2-4: Single-Phase Three-Wire Meter with Two Shunt Sensors
36
Calibration Theory
37
Calibration with Three Measurements
37
Figure 2-4: Watt Meter with Gain and Phase Errors
37
Calibration with Five Measurements
38
Calibration Procedures
40
Calibration Equipment
40
Phase-By-Phase Calibration
40
Detailed Calibration Procedures
40
Figure 2-5: Phase Angle Definitions
40
Calibration Procedure with Three Measurements
41
Calibration Procedure with Five Measurements
42
Calibration Spreadsheets
42
Figure 2-7: Calibration Spreadsheet for Three Measurements
43
Figure 2-8: Calibration Spreadsheet for Five Measurements
44
Compensating for Non-Linearities
45
Figure 2-9: Non-Linearity Caused by Quantification Noise
45
Temperature Compensation
46
Error Sources
46
Table 2-1: Temperature-Related Error Sources
46
Software Features for Temperature Compensation
47
Calculating Parameters for Compensation
48
Figure 2-10: GAIN_ADJ over Temperature
49
Figure 2-11: GAIN_ADJ and GAIN_ADJ' over Temperature
49
Table 2-2: Temperature-Related Error Sources
50
Testing the Demo Board
51
Functional Meter Test
51
Figure 2-12: Meter with Calibration System
52
Figure 2-13: Calibration System Screen
52
Sensors and Sensor Placement
53
Self-Heating
53
Figure 2-14: Wh Load Lines at Room Temperature with 71M6201 and 50 Μω Shunts
53
Placement of Sensors (ANSI)
54
Placement of Sensors (IEC)
55
Figure 2-15: Typical Sensor Arrangement (Left), Recommended Arrangement (Right)
55
Figure 2-16: Improved Sensor Arrangement
55
Other Techniques for Avoiding Magnetic Crosstalk
56
Figure 2-17: Loop Formed by Shunt and Sensor Wire
56
Figure 2-18: Shunt with Compensation Loop
56
Figure 2-19: Shunt with Center Drill Holes
56
Hardware Description
58
71M6541-DB Description: Jumpers, Switches and Test Points
58
Table 3-1: 71M6541-DB REV 3.0 Description
60
Figure 3-1: 71M6541-DB REV 3.0 - Board Description
61
Board Hardware Specifications
62
Appendix
64
71M6541-DB Electrical Schematic
65
Figure 4-1: 71M6541-DB REV 3.0 Demo Board: Electrical Schematic 1/2
65
Figure 4-2: 71M6541-DB REV 3.0 Demo Board: Electrical Schematic 2/2
66
71M6541-DB Bill of Material
67
Table 4-1: 71M6541-DB REV 3.0: Bill of Material
67
71M6541-DB PCB Layout
69
Figure 4-3: 71M6541-DB REV 3.0: Top View
69
Figure 4-4: 71M6541-DB REV 3.0: Top Copper
70
Figure 4-5: 71M6541-DB REV 3.0: Bottom View
71
Figure 4-6: 71M6541-DB REV 3.0: Bottom Copper
72
71M6541 Pinout Information
73
Table 4-3: 71M6541 Pin Description Table 1/3
73
Table 4-4: 71M6541 Pin Description Table 2/3
73
Table 4-5: 71M6541 Pin Description Table 3/3
74
Figure 4-14: 71M6541, LQFP64: Pinout (Top View)
75
Revision History
76

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