71M6521DE ICs Datasheet

71M6521DE Datasheet, PDF, Equivalent


Part Number

71M6521DE

Description

Energy Meter ICs

Manufacture

Maxim Integrated

Total Page 30 Pages
Datasheet
Download 71M6521DE Datasheet


71M6521DE
19-5370; Rev 3; 7/12
71M6521DE/DH/FE
Energy Meter ICs
DATA SHEET
GENERAL DESCRIPTION
The Teridian™ 71M6521DE/DH/FE energy meter ICs are highly integrated
systems-on-a-chip (SoCs) with an MPU core, RTC, flash, and LCD driver.
The Single Converter Technology® with a 22-bit delta-sigma ADC, four
analog inputs, digital temperature compensation, precision voltage
reference, battery voltage monitor, and 32-bit computation engine (CE)
supports a wide range of residential 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. The ICs support 2-wire, 3-wire, and 4-wire single-
phase and dual-phase residential metering along with tamper-detection
mechanisms.
Maximum design flexibility is provided by multiple UARTs, I2C,
MICROWIRE®, up to 18 DIO pins, and in-system programmable flash
memory, which can be updated with data or application code in operation.
A complete array of ICE and development tools, programming libraries, and
reference designs enable rapid development and certification of TOU,
AMR, and prepay meters that comply with worldwide electricity metering
standards.
A
NEUT
B
CT/SHUNT
LOAD
LOAD
POWER SUPPLY
AMR
RX/DIO1
IR TX/DIO2
POWER
FAULT
32 kHz
CONVERTER
IA
VA
IB
VB
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
OSC/PLL
XIN
XOUT
V3.3A
V3.3
SYS
TERIDIAN
71M6521
GNDA GNDD
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
V2.5
TEMP
SENSOR
DIO, PULSE
RAM
FLASH
COMPUTE
ENGINE
MPU
RTC
TIMERS
COM0..3
SEG0..18
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
SEG 32,33,
38/ICE
ICE_E
ICE
07/25/2007
BATTERY
3.3V LCD
88.88.8888
IIC or uWire
EEPROM
TEST PULSES
V3P3D
GNDD
Teridian is a trademark and Single Converter Technology is a registered
trademark of Maxim Integrated Products Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
FEATURES
Up to 0.1% Wh Accuracy Over 2000:1 Current
Range
Exceeds IEC 62053/ANSI C 12.20 Standards
Voltage Reference < 40 ppm/°C (< 20ppm/°C for
71M6521DH)
Four Sensor Inputs—VDD Referenced
Low-Jitter Wh and VARh Pulse Test Outputs
(10kHz max)
Pulse Count for Pulse Outputs
Four-Quadrant Metering
Tamper Detection
Neutral Current with CT or Shunt
Line Frequency Count for RTC
Digital Temperature Compensation
Sag Detection for Phase A and B
Independent 32-Bit Compute Engine
46-64Hz Line Frequency Range with Same
Calibration
Phase Compensation (±7°)
Battery backup for RTC and battery monitor
Three Battery Modes with Wake-Up on Pushbutton
or Timer:
Brownout Mode (48µA)
LCD Mode (5.7µA)
Sleep Mode (2.9µA)
Energy Display on Main Power Failure
Wake-Up with Pushbutton
22-Bit Delta-Sigma ADC
8-Bit MPU (80515), 1 Clock Cycle per Instruction
with Integrated ICE for MPU Debug
RTC with Temperature Compensation
Auto-Calibration
Hardware Watchdog Timer, Power-Fail Monitor
LCD Driver (Up to 152 Pixels)
Up to 18 General-Purpose I/O Pins
32kHz Time Base
16KB (6521DE/DH) or 32KB (6521FE) Flash with
Security
2KB MPU XRAM
Two UARTs for IR and AMR
Digital I/O Pins Compatible with 5V Inputs
64-Pin LQFP or 68-Pin QFN Package
Lead(Pb)-Free Packages
Rev 3
Page: 1 of 107

71M6521DE
71M6521DE/DH/FE Data Sheet
Table of Contents
GENERAL DESCRIPTION ........................................................................................................................ 1
FEATURES ................................................................................................................................................ 1
HARDWARE DESCRIPTION..................................................................................................................... 10
Hardware Overview ..................................................................................................................... 10
Analog Front End (AFE)............................................................................................................... 10
Input Multiplexer ............................................................................................................ 10
A/D Converter (ADC)..................................................................................................... 11
FIR Filter........................................................................................................................ 11
Voltage References ....................................................................................................... 11
Temperature Sensor...................................................................................................... 12
Battery Monitor .............................................................................................................. 13
Functional Description ................................................................................................... 13
Digital Computation Engine (CE) ................................................................................................. 13
Meter Equations ............................................................................................................ 14
Description................................................................................................................................... 14
Real-Time Monitor ......................................................................................................... 15
Pulse Generator ............................................................................................................ 15
CE Functional Overview ................................................................................................ 15
80515 MPU Core........................................................................................................... 17
Memory Organization .................................................................................................... 17
Special Function Registers (SFRs)................................................................................ 19
Special Function Registers (Generic 80515 SFRs) ....................................................... 20
Special Function Registers Specific to the 71M6521DE/DH/FE .................................... 22
Instruction Set................................................................................................................ 23
UART............................................................................................................................. 23
Timers and Counters ..................................................................................................... 25
WD Timer (Software Watchdog Timer).......................................................................... 28
Interrupts ....................................................................................................................... 30
On-Chip Resources ..................................................................................................................... 38
Oscillator ....................................................................................................................... 38
PLL and Internal Clocks ................................................................................................ 38
Real-Time Clock (RTC) ................................................................................................. 38
Temperature Sensor...................................................................................................... 38
Physical Memory ........................................................................................................... 39
Optical Interface ............................................................................................................ 40
Digital I/O....................................................................................................................... 40
LCD Drivers ................................................................................................................... 42
Battery Monitor .............................................................................................................. 42
EEPROM Interface ........................................................................................................ 43
Page: 2 of 107
Rev 3


Features 19-5370; Rev 3; 7/12 71M6521DE/DH/FE En ergy Meter ICs DATA SHEET GENERAL DESC RIPTION The Teridian™ 71M6521DE/DH/FE energy meter ICs are highly integrated systems-on-a-chip (SoCs) with an MPU c ore, RTC, flash, and LCD driver. The Si ngle Converter Technology® with a 22-b it delta-sigma ADC, four analog inputs, digital temperature compensation, prec ision voltage reference, battery voltag e monitor, and 32-bit computation engin e (CE) supports a wide range of residen tial metering applications with very fe w low-cost external components. A 32kHz crystal time base for the entire syste m and internal battery-backup support f or RAM and RTC further reduce system co st. The ICs support 2-wire, 3-wire, and 4-wire singlephase and dual-phase resi dential metering along with tamper-dete ction mechanisms. Maximum design flexib ility is provided by multiple UARTs, I2 C, MICROWIRE®, up to 18 DIO pins, and in-system programmable flash memory, wh ich can be updated with data or application code in operation. .
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