71M6521DE/71M6521FE
Energy Meter IC
DATA SHEET
JANUARY 2008
GENERAL DESCRIPTION
The TERIDIAN 71M6521DE/FE is a highly integrated SOC with an MPU
core, RTC, FLASH and LCD driver. TERIDIAN’s patented 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 re-
sidential 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 IC supports 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, I
2
C,
μWire,
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 stan-
dards.
FEATURES
•
< 0.4% Wh accuracy over 2000:1 current range
and over temperature
•
Exceeds IEC62053 / ANSIC12.20 standards
•
Voltage reference < 40ppm/°C
•
Four sensor inputs—VDD referenced
•
Low jitter Wh and VARh pulse test outputs
(10kHz maximum)
•
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 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
•
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) 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-Free packages
A
NEUT
B
CT/SHUNT
LOAD
LOAD
POWER SUPPLY
CONVERTER
IA
VA
IB
VB
V3.3A
V3.3
GNDA GNDD
SYS
PWR MODE
CONTROL
WAKE-UP
REGULATOR
VBAT
V2.5
BATTERY
TERIDIAN
71M6521
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
TEMP
SENSOR
DIO, PULSE
RAM
FLASH
COMPUTE
ENGINE
COM0..3
SEG0..18
SEG 24..31/
DIO 4..11
SEG 34..37/
DIO 14..17
SEG 32,33,
38/ICE
3.3V LCD
88.88.8888
IIC or uWire
EEPROM
TEST PULSES
V3P3D
GNDD
AMR
RX/DIO1
TX/DIO2
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
OSC/PLL
XIN
XOUT
IR
POWER
FAULT
32 kHz
MPU
RTC
TIMERS
ICE
ICE_E
07/25/2007
v1.0
© 2005-2008 TERIDIAN Semiconductor Corporation
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TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
