71m6521be Maxim Integrated Products, Inc., 71m6521be Datasheet
71m6521be
Manufacturer Part Number
71m6521be
Description
Energy Meter Ic
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6521BE.pdf
(97 pages)
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The TERIDIAN 71M6521BE is a highly integrated SOC with an MPU core,
FLASH and LCD driver. TERIDIAN’s patented Single Converter Technol-
ogy™ 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 further reduces system cost. The IC
supports 2-wire single-phase residential metering along with tamper-
detection mechanisms.
Maximum design flexibility is provided by multiple UARTs, I
14 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 AMR and
Prepay meters that comply with worldwide electricity metering standards.
V1.0
A
NEUT
B
32 kHz
GENERAL DESCRIPTION
CT/SHUNT
POWER
FAULT
AMR
IR
RX/DIO1
TX/DIO2
COMPARATOR
SERIAL PORTS
VOLTAGE REF
XIN
V1
XOUT
IA
VA
IB
VB
TX
RX
CONVERTER
VBIAS
VREF
DRIVE/MOD
LOAD
LOAD
OSC/PLL
SENSE
71M6521BE
TERIDIAN
COMPUTE
POWER SUPPLY
SENSOR
ENGINE
TIMERS
FLASH
MPU
V3.3A
TEMP
RAM
ICE
© 2005-2008 TERIDIAN Semiconductor Corporation
V3.3
SYS
GNDA GNDD
REGULATOR
PWR MODE
DIO, PULSE
SEG 24..31/
SEG 34..37/
SEG 32,33,
CONTROL
WAKE-UP
DIO 14..17
SEG0..18
DIO 4..11
COM0..3
VBAT
38
V2.5
11/14/2007
ICE_E
2
C, μWire, up to
BATTERY
888888.88
TEST PULSE
I
2
EEPROM
C or µWire
3.3V LCD
V3P3D
GNDD
• < 0.4% Wh accuracy over 2000:1 current range
• Exceeds IEC62053 / ANSI C12.20 standards
• Voltage reference < 40ppm/°C
• Four sensor inputs—VDD referenced
• Low jitter Wh test output (10kHz maximum)
• Pulse count for Wh pulse output
• Tamper detection: Neutral current with CT or
• Line frequency count for time keeping
• Digital temperature compensation
• Sag detection for phase A and B
• Independent 32-bit compute engine
• 46-64Hz line frequency range with same
• Phase compensation (±7°)
• Battery monitor
• Three battery modes w/ wake-up on push-button
• Energy display on main power failure
• Wake-up with push-button
• 22-bit delta-sigma ADC
• 8-bit MPU (80515), 1 clock cycle per instruction
• Hardware watchdog timer, power fail monitor
• LCD driver (up to 140 pixels)
• Up to 14 general purpose I/O pins
• 32kHz time base
• 8KB FLASH with security
• 2KB MPU XRAM
• Two UARTs for IR and AMR
• Digital I/O pins compatible with 5V inputs
• 64-pin LQFP
• Lead Free package
and over temperature
shunt
calibration
or timer:
w/ integrated ICE for MPU debug
Brownout mode (48µA)
LCD mode (5.7µA)
Sleep mode (2.9µA)
Energy Meter IC
FEATURES
71M6521BE
DATA SHEET
JANUARY 2008
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