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71M6531D Datasheet, PDF (1/115 Pages) Teridian Semiconductor Corporation – Energy Meter IC
Simplifying System IntegrationTM
71M6531D/F, 71M6532D/F
Energy Meter IC
DATA SHEET
October 2009
GENERAL DESCRIPTION
FEATURES
The Teridian 71M6531D/F and 71M6532D/F are highly inte-
grated SOCs 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 com-
pensation, 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 32-kHz crystal time base for the entire system and internal bat-
tery backup support for RAM and RTC further reduce system
cost. The IC supports 2-wire, and 3-wire single-phase and
dual-phase residential metering along with tamper-detection
mechanisms. The 71M6531D/F offers single-ended inputs for
two current channels and two single-ended voltage inputs. The
71M6532D/F has two differential current inputs and three sin-
gle-ended voltage inputs.
Maximum design flexibility is provided by multiple UARTs, I2C,
μWire, up to 21 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 standards.
A
CT/SHUNT
NEUTRAL
CT
B
LOAD
LOAD
POWER SUPPLY
AMR
RX/DIO1
IR TX/DIO2
POWER
FAULT
32 kHz
ADC
IAP*
IAN*
VA
IBP*
IBN*
VB
V3.3A
V3.3
SYS
GNDA GNDD
PWR MODE
TERIDIAN CONTROL
71M6531 WAKE-UP
71M6532 REGULATOR
VBAT
V2.5
VOLTAGE REF
VREF
VBIAS
SERIAL PORTS
TX
RX
SENSE
DRIVE/MOD
COMPARATOR
V1
OSC/PLL
XIN
XOUT
TEMP
SENSOR
RAM
FLASH
MEMORY
COMPUTE
ENGINE
MPU
TIMERS
RTC
ICE I/F
LCD & DIO
COM0..3
LCD SEG
SEG/DIO
SPI
ICE_E
* Differential pins only on 6532D/F
02/18/2009
BATTERY
88. 88. 8888
I2C or µWire
EEPROM
TEST PULSES
SPI HOST
V3P3D
GNDD
• Wh accuracy < 0.1% over 2000:1 current
range
• Exceeds IEC62053/ANSI C12.20 standards
• Four sensor inputs
• Low-jitter Wh and VARh plus two additional
pulse test outputs (4 total, 10 kHz maximum)
with pulse count
• Four-quadrant metering
• Tamper detection (Neutral current with CT,
Rogowski or shunt, magnetic tamper input)
• Line frequency count for RTC
• Digital temperature compensation
• Sag detection for phase A and B
• Independent 32-bit compute engine
• 46-64 Hz line frequency range with same
calibration. Phase compensation (± 7°)
• Three battery modes with wake-up on timer
or push-button:
Brownout mode (52 µA typ.)
LCD mode (21 µA typ., DAC active)
Sleep mode (0.7 µA typ.)
• Energy display during mains power failure
• 39 mW typical consumption @ 3.3 V, MPU
clock frequency 614 kHz
• 22-bit delta-sigma ADC with 3360 Hz or
2520 Hz sample rate
• 8-bit MPU (80515), 1 clock cycle per in-
struction, 10 MHz maximum, with integrated
ICE for debug
• RTC for TOU functions with clock-rate adjust
register
• Hardware watchdog timer, power fail monitor
• LCD driver with 4 common segment drivers:
Up to 156 (71M6531D/F) or 268 pixels
(71M6532D/F)
• Up to 22 (71M6531D/F) or 43
(71M6532D/F) general-purpose I/O pins.
Digital I/O pins compatible with 5 V inputs
• 32 kHz time base
• High-speed slave SPI interface to data RAM
• Two UARTs for IR and AMR, IR driver with
modulation
• FLASH memory with security and in-system
program update:
128 KB (71M6531D/32D)
256 KB (71M6531F/32F)
• 4 KB MPU XRAM
• Industrial temperature range
• 68-pin QFN package for 71M6531D/F pin-
compatible with 71M6521, 100-pin LQFP
package for 71M6532D/F, lead free
v1.2
© 2005-2009 TERIDIAN Semiconductor Corporation
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