71M6521BE Datasheet, PDF (1/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

GENERAL DESCRIPTION
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, I²C, μWire, up to
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.
A
NEUT
B
CT/SHUNT
LOAD
LOAD
POWER SUPPLY
AMR
RX/DIO1
IR _TX/DIO2
POWER
FAULT
32 kHz
CONVERTER
IA
VA
IB
VB
V3.3A
V3.3
SYS
TERIDIAN
71M6521BE
GNDA GNDD
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
V2.5
VOLTAGE REF
VREF
TEMP
SENSOR
DIO, PULSE
VBIAS
SERIAL PORTS
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
OSC/PLL
XIN
XOUT
RAM
FLASH
COMPUTE
ENGINE
MPU
TIMERS
ICE
COM0..3
SEG0..18
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
SEG 32,33,
38
ICE_E
11/14/2007
BATTERY
3.3V LCD
888888.88
I²C or µWire
EEPROM
TEST PULSE
V3P3D
GNDD
71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
FEATURES
• < 0.4% Wh accuracy over 2000:1 current range
and over temperature
• 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
shunt
• 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
calibration
• Phase compensation (±7°)
• Battery monitor
• Three battery modes w/ wake-up on push-button
or timer:
Brownout mode (48µA)
LCD mode (5.7µA)
Sleep mode (2.9µA)
• 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
w/ integrated ICE for MPU debug
• 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
V1.0
© 2005-2008 TERIDIAN Semiconductor Corporation
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