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71M6513-IGT/F |71M6513IGTFTERIDIANN/a90avai3-Phase Energy Meter ICs


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71M6513-IGT/F
3-Phase Energy Meter ICs
71M6513/71M6513H 3-Phase Energy Meter IC DATA SHEET
SEPTEMBER 2011
A Maxim Integrated Products Brand
GENERAL DESCRIPTION

The 71M6513 is a highly integrated system-on-chip SoC with an MPU core,
real-time clock (RTC), flash, and LCD driver. Our Single Converter
Technology® with a 21-bit delta-sigma ADC, six analog inputs, digital tem-
perature compensation, precision voltage reference, and 32-bit computation
engine (CE) supports a wide range of poly-phase metering applications with
very few low-cost external components. A 32kHz crystal time base for the
entire system and internal battery-backup support for RAM and RTC further
reduce system cost.
Maximum design flexibility is supported with multiple UARTs, I2C, a power-
fail comparator, a 5V LCD charge pump, up to 22 DIO pins, and an in-
system programmable flash. The device is offered in high (0.1%) and
standard (0.5%) accuracy versions for multifunction residential/commercial
meter applications requiring multiple voltage/current inputs and complex
LCD or DIO configurations.
A complete array of ICE and development tools, programming libraries and
reference designs enable rapid development and certification of meters that
meet most demanding worldwide electricity metering standards.
FEATURES
Wh Accuracy < 0.1% Over 2,000:1
Current Range  Exceeds IEC 62053/ANSIC 12.20  Voltage Reference
< 10ppm/°C (71M6513H)
< 40ppm/°C (71M6513)  Six Sensor Inputs—VDD Referenced  Auxiliary Analog Input for Neutral
Current  Low Jitter Wh/VARh Pulse Outputs  Pulse Count For Pulse Outputs  Four-Quadrant Metering  Phase Sequencing  Line Frequency Count for RTC  Digital Temperature Compensation  Sag Detection  Independent 32-Bit Compute Engine  40-70Hz Line Frequency Range with
Same Calibration  Phase Compensation (±7°)  Battery Backup for RAM and RTC  22mW at 3.3V, 7.2µW Backup  Flash Memory Option with Security  8-Bit MPU (80515)—One Clock
Cycle per Instruction  LCD Driver (≤ 168 Pixels)  High-Speed SSI Serial Output  RTC for Time-of-Use Functions  Hardware Watchdog Timer  Up to 22 General-Purpose I/O Pins  64KB Flash, 7KB RAM  Two UARTs for IR and AMR  100-Pin LQFP Package
MPU
RTC
TIMERS
XIN
XOUT
VREF
COM0..3
V3.3AV3.3D
VBAT
V2.5
VLCD
VBIAS
VDRV
SEG0..23
GNDAGNDD
SEG 24..27
DIO 0..11
SEG 32..41
DIO 12..21
ICE
LIVE
LIVE
LIVE
NEUTRAL
LOAD
MISC
POWER
FAULT
Etc.
IR
AMR
EEPROM
BATTERY
COMPARATOR

SENSE
DRIVE
SERIAL PORTS
OSC/PLL
CONVERTER
LCD DRIVER
DIO, PULSE

COMPUTE
ENGINE
FLASH
RAM
VOLTAGE REF

32 kHz
REGULATOR
5V BOOST

CT /COIL
POWER SUPPLY
TERIDIAN
71M6513

3/5V LCD
TEMP SENSOR
19-5360; Rev 3; 9/11
Single Converter Technology is a registered trademark of
71M6513/71M6513H 3-Phase Energy Meter IC DATA SHEET
AUGUST 2011
A Maxim Integrated Products Brand
Table of Contents

FEATURES ............................................................................................................................ 1
HARDWARE DESCRIPTION ................................................................................................................ 9
Hardware Overview ................................................................................................................. 9
Analog Front End (AFE) .......................................................................................................... 9
Multiplexer................................................................................................................. 9
ADC .......................................................................................................................... 10
FIR Filter ................................................................................................................... 10
Voltage Reference ..................................................................................................... 10
Temperature Sensor .................................................................................................. 11
V3 ............................................................................................................................. 11
Functional Description ............................................................................................... 11
Computation Engine (CE) ........................................................................................................ 12
Meter Equations ........................................................................................................ 12
Pulse Generator ........................................................................................................ 13
Real-Time Monitor ..................................................................................................... 13
CE Functional Overview ............................................................................................ 13
80515 MPU Core .................................................................................................................... 16
80515 Overview ........................................................................................................ 16
Memory Organization ................................................................................................ 16
Special Function Registers (SFRs) ............................................................................. 18
Special Function Registers (Generic 80515 SFRs) ..................................................... 19
Special Function Registers Specific to the 71M6513 ................................................... 22
Instruction Set ........................................................................................................... 23
UART ........................................................................................................................ 23
Timers and Counters ................................................................................................. 26
WD Timer (Software Watchdog Timer) ....................................................................... 28
Interrupts ................................................................................................................... 31
External Interrupts ..................................................................................................... 34
Interrupt Priority Level Structure ................................................................................. 35
Interrupt Sources and Vectors .................................................................................... 37
On-Chip Resources ................................................................................................................. 39
DIO Ports .................................................................................................................. 39
71M6513/71M6513H 3-Phase Energy Meter IC DATA SHEET
SEPTEMBER 2011
A Maxim Integrated Products Brand

Physical Memory ....................................................................................................... 41
Oscillator ................................................................................................................... 42
Real-Time Clock (RTC).............................................................................................. 42
Comparators (V2, V3) ................................................................................................ 42
LCD Drivers .............................................................................................................. 43
LCD Voltage Boost Circuitry....................................................................................... 43
UART (UART0) and Optical Port (UART1).................................................................. 44
Hardware Reset Mechanisms .................................................................................... 44
Reset Pin (RESETZ).................................................................................................. 44
Hardware Watchdog Timer ........................................................................................ 44
Crystal Frequency Monitor ......................................................................................... 44
V1 Pin ....................................................................................................................... 44
Internal Clocks and Clock Dividers ............................................................................. 45
I2C Interface (EEPROM) ........................................................................................... 45
Battery ...................................................................................................................... 47
Internal Voltages (VBIAS, VBAT, V2P5) ..................................................................... 47
Test Ports ................................................................................................................. 47
FUNCTIONAL DESCRIPTION .............................................................................................................. 49
Theory of Operation ................................................................................................................ 49
System Timing Summary......................................................................................................... 50
Data Flow ............................................................................................................................... 52
CE/MPU Communication ......................................................................................................... 52
Fault, Reset, Power-Up ........................................................................................................... 53
Battery Operation .................................................................................................................... 54
Power Save Modes ................................................................................................................. 54
Chopping Circuitry ................................................................................................................... 55
Internal/External Pulse Generation and Pulse Counting ............................................................ 57
Program Security .................................................................................................................... 58
FIRMWARE INTERFACE ..................................................................................................................... 59
I/O RAM MAP – In Numerical Order ......................................................................................... 59
SFR MAP (SFRs Specific to Teridian 80515) – In Numerical Order ........................................... 60
I/O RAM (Configuration RAM) – Alphabetical Order.................................................................. 61
CE Program and Environment ................................................................................................. 67
CE Program .............................................................................................................. 67
Formats..................................................................................................................... 67
71M6513/71M6513H 3-Phase Energy Meter IC DATA SHEET
AUGUST 2011
A Maxim Integrated Products Brand

Constants .................................................................................................................. 67
Environment .............................................................................................................. 67
CE Calculations ......................................................................................................... 68
CE RAM Locations .................................................................................................... 68
CE Front End Data (Raw Data) .................................................................................. 69
CE Status Word......................................................................................................... 69
CE Transfer Variables ............................................................................................... 70
TYPICAL PERFORMANCE DATA......................................................................................................... 77
Wh Accuracy at Room Temperature ........................................................................................ 77
VARh Accuracy at Room Temperature .................................................................................... 77
Harmonic Performance ............................................................................................................ 78
APPLICATION INFORMATION ............................................................................................................. 79
Connection of Sensors (CT, Resistive Shunt, Rogowski Coil) ................................................... 79
Distinction between 71M6513 and 71M6513H Parts ................................................................. 79
Temperature Compensation and Mains Frequency Stabilization for the RTC............................. 80
External Temperature Compensation ....................................................................................... 81
Temperature Measurement ..................................................................................................... 81
Crystal Oscillator ..................................................................................................................... 83
Connecting LCDs .................................................................................................................... 84
Connecting I2C EEPROMs ...................................................................................................... 85
Connecting 5V Devices ........................................................................................................... 85
Optical Interface ...................................................................................................................... 87
Connecting V1 and Reset Pins ................................................................................................ 87
Connecting the V3 Pin ............................................................................................................. 88
Connecting a Battery ............................................................................................................... 88
Flash Programming ................................................................................................................. 89
MPU Firmware Library............................................................................................................. 89
SPECIFICATIONS ................................................................................................................................ 90
Electrical Specifications ........................................................................................................... 90
LOGIC LEVELS......................................................................................................... 91
VREF, VBIAS ............................................................................................................ 93
CRYSTAL OSCILLATOR ........................................................................................... 93
LCD BOOST ............................................................................................................. 95
LCD DRIVERS .......................................................................................................... 95
RTC .......................................................................................................................... 95
71M6513/71M6513H 3-Phase Energy Meter IC DATA SHEET
SEPTEMBER 2011
A Maxim Integrated Products Brand

RESETZ.................................................................................................................... 95
COMPARATORS ...................................................................................................... 96
RAM AND FLASH MEMORY ..................................................................................... 96
FLASH MEMORY TIMING ......................................................................................... 96
EEPROM INTERFACE .............................................................................................. 96
Recommended External Components ...................................................................................... 97
Packaging Information ............................................................................................................. 98
Pinout (Top View) ...................................................................................................... 99
Pin Descriptions ........................................................................................................ 100
I/O Equivalent Circuits: .............................................................................................. 102
ORDERING INFORMATION ................................................................................................... 103
Figures

Figure 1: IC Functional Block Diagram .......................................................................................................................... 8
Figure 2: General Topology of a Chopped Amplifier ..................................................................................................... 10
Figure 3: AFE Block Diagram...................................................................................................................................... 11
Figure 4: Samples in Multiplexer Cycle ....................................................................................................................... 14
Figure 5: Accumulation Interval.................................................................................................................................. 14
Figure 6: Memory Map .............................................................................................................................................. 16
Figure 7: Interrupt Structure ...................................................................................................................................... 38
Figure 8: DIO Ports Block Diagram ............................................................................................................................. 39
Figure 9: Oscillator Circuit ......................................................................................................................................... 42
Figure 10: LCD Voltage Boost Circuitry ....................................................................................................................... 43
Figure 11: Voltage Range for V1 ................................................................................................................................ 45
Figure 12: Voltage. Current, Momentary and Accumulated Energy................................................................................ 49
Figure 13: Timing Relationship between ADC MUX, CE, and Serial Transfers ................................................................ 50
Figure 14: RTM Output Format .................................................................................................................................. 51
Figure 15: SSI Timing, (SSI_FPOL = SSI_RDYPOL = 0) ............................................................................................ 51
Figure 16: SSI Timing, 16-bit Field Example (External Device Delays SRDY) ................................................................. 51
Figure 17: MPU/CE Data Flow .................................................................................................................................... 52
Figure 18: MPU/CE Communication (Functional) ......................................................................................................... 53
Figure 19: MPU/CE Communication (Processing Sequence) ........................................................................................ 53
Figure 20: Timing Diagram for Voltages, Current and Operation Modes after Power-Up ................................................. 54
Figure 21: Chop Polarity w/ Automatic Chopping ........................................................................................................ 56
Figure 22: Sequence with Alternate Multiplexer Cycles ................................................................................................ 56
Figure 23: Sequence with Alternate Multiplexer Cycles and Controlled Chopping ........................................................... 57
Figure 24: Wh Accuracy, 0.3A - 200A/240V ................................................................................................................ 77
Figure 25: VARh Accuracy for 0.3A to 200A/240V Performance ................................................................................... 78
Figure 27: Meter Accuracy over Harmonics at 240V, 30A ............................................................................................ 78
Figure 29: Resistive Voltage Divider (left), Current Transformer (right) ......................................................................... 79
Figure 30: Resistive Shunt (left), Rogowski Coil (right) ............................................................................................... 79
Figure 31: Crystal Frequency over Temperature .......................................................................................................... 80
Figure 32: Crystal Compensation ............................................................................................................................... 81
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