FEATURES
• < 0.4% Wh accuracy over industrial
temperature and 2000:1 current range
• Four analog inputs
• Exceeds IEC62053 / ANSIC12.20
• Voltage reference < 40ppm/°C
• CT, Shunt or combination
• Wh and VARh pulse outputs, up to 10kHz
• Internal pulse counting
The new 71M6521 product family represents Teridian’s second
generation electricity metering technology for cost sensitive
residential applications. This SOC device is footprint compatible
with 71M6511, integrates AFE, MCU, RTC, FLASH and LCD driver
but offers lower cost 8/16/32 KB FLASH options, more I/O,
advanced power management and tamper detection. Teridian’s
TM
patented Single Converter Technology
with a 22bit 2nd order
• 40-70Hz frequency range with phase
compensation (±7°)
delta-sigma converter,
4 analog inputs, digital temperature
compensation, voltage reference and flexible 32-bit computation
engine meet all current and evolving metering requirements
worldwide with minimal external components.
• 8-bit MPU (80515), 1 instruction/cycle
• 2kB MPU Data RAM
• 0.5KB CE Data RAM
• 8, 16 or 32 KB FLASH with Security
• Mask ROM option
• Real Time Clock (6521D/F models)
• Temp. sensor for RTC compensation
• Battery backup for RTC w/ Battery monitor
Low system cost is supported with 2 UARTs, I2C/µWire EEPROM
interface, battery monitor, power fail monitor, neutral current or
magnetic tamper detection, program/data FLASH, mask ROM
option and operation with capacitive power supply.
Teridian’s large portfolio of solutions for residential, commercial and
industrial metering offers OEMs a comprehensive array of ICs,
tools, reference designs and above all a unique ability to
differentiate their products in the market.
• Sleep, LCD and Brownout power modes
w/ wake-up on push-button or timer
• Fast wakeup into brownout mode
CT/SHUNT
A
(<400µs)
LOAD
POWER SUPPLY
NEUT
• Internal battery monitor
• 32Khz or 4.19Mhz crystal options
• Two event counter/timers
• Watchdog timer, power fail monitor
• 3.3 Volt LCD driver
• Up to 152 pixels (in 68 pin package)
• Up to 18 DIO (in 68 pin package)
• 32kHz or 4.2MHz selectable crystal
• Two UARTs for IR and AMR
• 38KHz IR modulation option
• 64-lead LQFP or 68-pin QFN package
• Lead Free package option
• Modular S/W library with additional
options/features
LOAD
B
CONVERTER
IA
V3.3
SYS
V3.3A
GNDA GNDD
PWR MODE
CONTROL
VA
IB
VB
TERIDIAN
71M6521
WAKE-UP
REGULATOR
VBAT
V2.5
BATTERY
TEMP
SENSOR
VOLTAGE REF
DIO, PULSE
VREF
VBIAS
RAM
3.3V LCD
COM0..3
SERIAL PORTS
SEG0..18
SEG 24..31/
DIO 4..11
88.88.8888
FLASH/
ROM
TX
RX
AMR
IR
SEG 34..37/
DIO 14..17
COMPUTE
ENGINE
IIC or uWire
EEPROM
RX/DIO1
TX/DIO2
SENSE
DRIVE/MOD
SEG 32,33,
38/ICE
COMPARATOR
V1
MPU
RTC
TIMERS
POWER
FAULT
TEST PULSES
OSC/PLL
V3P3D
GNDD
XIN
32 kHz or
4.1943MHz
ICE_E
ICE
XOUT
04/29/2005
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