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71M6545 Datasheet, PDF (1/134 Pages) Maxim Integrated Products – Four-Quadrant Metering, Phase Metrology Processors Flash/RAM Size | |||
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19-5378; Rev 1.0; 4/11
A Maxim Integrated Products Brand
71M6545/71M6545H
Metrology Processors
DATA SHEET
April 2011
GENERAL DESCRIPTION
FEATURES
The 71M6545/71M6545H metrology processors are based on
Teridianâs 4th-generation metering architecture supporting the
71M6xxx series of isolated current sensing products that offer
drastic reduction in component count, immunity to magnetic
tampering, and unparalleled reliability. The 71M6545/71M6545H
integrate our Single Converter Technology® with a 22-bit delta-
sigma ADC, a customizable 32-bit computation engine (CE) for
core metrology functions, as well as a user-programmable 8051-
compatible application processor (MPU) core with up to 64KB
flash and up to 5KB RAM.
An external host processor can access metrology functions di-
rectly through the SPI⢠interface, or alternatively through the
embedded MPU core in applications requiring metrology data
capture, storage, and preprocessing within the metrology
subsystem. In addition, the devices integrate an RTC, DIO, and
UART. A complete array of ICE and development tools,
programming libraries, and reference designs enable rapid
development and certification of meters that meet all ANSI and
IEC electricity metering standards worldwide.
⢠Up to < 0.1% Accuracy Over 2000:1
Current Range
⢠Exceeds IEC 62053/ANSI C12.20 Standards
⢠Seven Sensor Inputs with Neutral Current
Measurement, Differential Mode Selectable
for Current Inputs
⢠Selectable Gain of 1 or 8 for One Current
Input to Support Shunts
⢠High-Speed Wh/VARh Pulse Outputs with
Programmable Width
⢠Flash/RAM Size
32KB/3KB (71M6545)
64KB/5KB (71M6545H)
⢠Up to Four Pulse Outputs with Pulse Count
⢠Four-Quadrant Metering, Phase
Sequencing
⢠Digital Temperature Compensation
Metrology Compensation
Shunt Resistor Sensors
C
NEUTRAL
B
A
LOAD
Accurate RTC for TOU Functions with
Automatic Temperature Compensation
for Crystal in All Power Modes
⢠Independent 32-Bit Compute Engine
⢠46â64Hz Line Frequency Range with the
Same Calibration
POWER SUPPLY
This system is referenced to Neutral
NEUTRAL
⢠Phase Compensation (±7°)
⢠1µA Supply Current in Sleep Mode
⢠Flash Security
HOST
Pulse Transformers
C
B
A
SPI_CKI
SPI_DI
SPI_DO
SPI_CSZ
XFER_BUSY
SAG
MUX and ADC
IADC0
IADC1
} IN*
VADC10 (VC)
IADC6
IADC7
} IC
VADC9 (VB)
IADC4
IADC5
}
IB
VADC8 (VA)
IADC2
IADC3
} IA
V3P3A V3P3SYS GNDA GNDD
PWR MODE
CONTROL
TERIDIAN
PB
71M6545/H REGULATOR
TEMPERATURE
SENSOR
VBAT_RTC
BATTERY
MONITOR
VREF
SERIAL PORT
RX
TX
FLASH
MEMORY
RAM
MPU
RTC
TIMERS
OSCILLATOR/
PLL XIN
XOUT
DIO, PULSES,
LEDs
DIO
ICE
T
SPI INTERFACE
M
U
COMPUTE
ENGINE
X
V3P3D
WPULSE
XPULSE
RPULSE
YPULSE
10/7/2010
RTC
BATTERY
32 kHz
24
DIO
I2C or µWire
EEPROM
PULSES 3.3 VDC
*IN = Optional Neutral Current
⢠In-System Program Update
⢠8-Bit MPU (80515), Up to 5 MIPS, for
Optional Implementation of Postprocessing
and Host Support Functions (Optional Use)
⢠Up to 29 DIO Pins
⢠Hardware Watchdog Timer (WDT)
⢠I2C/MICROWIRE® EEPROM Interface
⢠SPI Interface for Host:
Full Access to Shared Memory Space
Flash Program Capability
⢠UART
⢠Industrial Temperature Range
⢠64-Pin Lead(Pb)-Free LQFP Package
Single Converter Technology is a registered trademark of Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National Semiconductor Corp.
v1.0
© 2008â2011 Teridian Semiconductor Corporation
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