Ultra-low power design withUltra-low power design with

MSP43

0

Three Phase Electricity MeterSolution

Texas Instruments Ultra-low-power µController

Vincent Chan TIHK Nov. 2001

Ultra-low power design withUltra-low power design with

MSP43

0

Class 0.5 accuracy for 5-20A, 100-300V nominal voltage at 50-60Hz (options for 5-60A)

Programmable multi-tariff systems, provide 40kb of non- volatile memory (FLASH) for data logging.

Provide advance power measurement features such as Power Factor, Active, Reactive power, Peak power, Peak demand time etc.

One button, fully automatic calibration to simplify manufacturing

Full temperature range from –40 to +85 °C

Standby power consumption of 3A with real time clock and calendar functional. 10+ years of standby time.

Built in Temperature sensor for automatic compensation.

Design Targets

Ultra-low power design withUltra-low power design with

MSP43

0

In system reprogrammability through serial port with 256 bit password.

Open source code provided in C, Flash MCU can be easily reprogrammed to different customers’ requirements

low cost, easy to use development tool, on site diagnosis using a notebook PC.

Optional US or Europe ISM Band r-f AMR (automatic metering reading) capability available.

Design Targets contin.

Ultra-low power design withUltra-low power design with

MSP43

0

1、在 5-20A电流时可达 0.5级精度， 50-60Hz的额定电压为 100-300V

2、可编程复费率系统，提供 60K的非易失性 FLASH存贮空间。3、提供预付费电力测量特性如：功率因子、有功率、无功功率峰值电压、峰值功率需要量时间等

4、单键全自动校准以便制造简单5、工业级标准，温度范围从 -40 -85℃ ℃6、静态电流为 3μA，此时实时时钟还在运行，以便实现日历功能7、内置温度传感器可以用来自动补偿8、在串行口上通过 256位口令校验，可进行系统重复远程编程。9、提供开放式 C语言源代码，MSP430FLASH型的MCU可按照不同消费者的要求实现二次编程。

10、低廉、易操作的开发工具，可用笔记本电脑进行现场诊断。 11、可选择美国或欧洲 ISM波段（ ARM）进行 RF无线自动读取测量数据

Design Targets contin.

Ultra-low power design withUltra-low power design with

MSP43

0

ADCMEM0

ADCMEM5

ADCMEM1

ADCMEM2

ADCMEM3

ADCMEM4

32 b

it M

ACAutoscan

16 bit RISC

Error p.f.phase 2 phase 3phase 1

LCD Glass

200ksps12bitADC

A3

A4

A5

A0

A1

A2

Ph

ase

2

Ph

ase

3

Neu

tral

Ph

ase

1

CT + Pre-amp

160 segment LCD Driver

MSP430F44X

Single Chip 3 phase electricity measurement

Ultra-low power design withUltra-low power design with

MSP43

0

Demonstration PCB board

Op-amp LM358, TLC279

CT:Phase 1Phase 2Phase 3

Power pulse LEDs

MSP430F449

Includes 60K flash ROM and

LCD Driver

Battery slot

Ultra-low power design withUltra-low power design with

MSP43

0

Ultra-low Power Consumption 1.8 V ... 3.6 V Supply Voltage Range

200 µA Active Current @ 1MHz, 2.2V

0.7 µA Stand-by Current (10 years battery life)

0.1 µA RAM Retention Off-mode Current

6 µs Wakeup from Standby Mode

Powerful CPU Core 16-Bit RISC Architecture, (27 instructions)

125 ns Instruction Cycle Time at 8 MHz

Flexible Peripherals Fast 12-bit A/D Converter (8 ext. & 4 int.

channels, conversion time <10 µs)

6/10 channels of 16 bits Timer

1* (or 2**) USART

115.2kb UART at 60uA

4800b UART at 2uA

Hardware Multiplier**

On-chip Comparator for Analog Signal Compare

Built in LCD driver

In System Programming

Built in debug logic

RUN THE MARATHON,NOT THE MILE.

TI’s Flash MSP430 MCU reducespower consumption drastically,so your batteries run longer.

* MSP430F13x** MSP430F14x

MSP430F44X Flash Family - Key Features

Ultra-low power design withUltra-low power design with

MSP43

0

100 pin QFP

MSP430F44x Configuration

DVCC DVSS RST/NMI

TEST/VPP

Test

JTAG

incl. 16 reg.

CPU

Flash 32 KB48 KB60 KB

RAM

1 KB2 KB2 KB

MAB,4bit

MDB,8bit

MCBBusconv.

Power

on

Reset

XIN1 XOut1

Oscillator System Clock

ACLK

MCLK

SMCLK

Rosc

Watchdog

15 / 16 bit

Timer

12 bit ADC

8 channels

<10us conv.

ComparatorA

Timer_A3

3 CC Register

Basic Timer 1

1 interrupt

vector

AVCC AVSS

XIN2

XOut2

BreakpointLogic

COMM port

USARTs

Two

HardwareMPY

MAB, 16bit

MDB, 16bit

I/O Port 1/2

P1 P2

16 I/O’swithinterr. capability

P3 P4

I/O Port 3/4 16 I/O’swithinterr. capability

I/O Port 5

P5

8 I/O’swithinterr. capability

8

R33

LCD

160

1-4 MUX

Timer_B7

7 CC Register

Shadow Reg.

Segment

A0..7 R03R13

R23

Ultra-low power design withUltra-low power design with

MSP43

0

a0

a1

a2

a3

a4

a5

a7

a6

Analog

Multi-plexer

12 : 1

AVCC

AVSS

1.5V or 2.5V

AVSS

AVCC

V REF+

AVCCAVSS

Sample

&

Hold

CLKSRC1

CLKSRC2

CLKSRC3

ADC12OSC

Internal

Oscillator

ADC12CLK

S/H

Divide by

1,2,3,4,5,6,7,8

Sampling

Timera8

a9

a10

a1112-bit S A R

ADC12DIV

REFON2_5V

ISSHSHP

ADC12CTLx.0..3

ADC12CTLx.4..6

T

SHT1

SHT0

ADC12ON

ADC12SSEL

SHS

VeREF+

V REF+

V REF- / VeREF-

V R+V R-

12-bit A/D converter core

ENC

Conversion CTL

MSC

Ref_X

INCH= 0Ah

Ref_X

SAMPCON

ADC12SC

ADC12I1

ADC12I2

ADC12I3

Reference

on on

0140h

0142h

015Ch

015Eh

080h

081h

08Eh

08Fh

ADC12MEM0

ADC12MEM1

ADC12MEM14

ADC12MEM15

16 x 12-bitADC Memory

16 x 8-bitADC Memory Control

ADC12MEM10

ADC12MEM9

ADC12MEM8

ADC12MEM6

ADC12MEM7

ADC12MEM5

ADC12MEM11

ADC12MEM4

ADC12MEM3

ADC12MEM2

ADC12MEM12

ADC12MEM13

ADC12CTL0

ADC12CTL1

ADC12CTL2

ADC12CTL3

ADC12CTL4

ADC12CTL5

ADC12CTL6

ADC12CTL7

ADC12CTL8

ADC12CTL9

ADC12CTL10

ADC12CTL11

ADC12CTL12

ADC12CTL13

ADC12CTL14

ADC12CTL15

082h

083h

084h

085h

086h

088h

087h

089h

08Ah

08Bh

08Ch

08Dh

0144h0146h

0148h

014Ah

014Ch

014Eh

0150h

0152h

0154h

0156h

0158h

015Ah

SHI

MSP430F44x/43x ADC12

12-bit ADC (succ. appr.) +/- 1 LSB (DNL/INL) Selectable reference

1.5V or 2.5V 8 Analog channels external

plus 4 internal Integrated temperature sensor Fast conversion (200ksps) Adjustable sample time Integrated Sample & Hold Single channel or multiple

channel measurement

FLASH

32/48/60kB

RAM

1/2kB

Pow er-OnReset

I/OPort 1/2

System Clock

Oscillator

I/OPort 3/4

I/OPort 5

W atchdogTimer

Timer_B7 Timer_A3 Com paratorUSART 0

UART/SPI

Hardw areMultiplier

12bit ADC

CPU TestJTAG

I/OPort 6

USART 1

UART/SPI

Busconv.

ACLK

SM CLK

X IN X O U T

M C LK

TM STC KTD I

TD O /TD I

ACLK

SM CLK

M AB-16bit

M DB-16bit

M CB

M DB-8bit

M AB-4bit

4

D V C C D V S S A V C C A V S S R S T/N M I P 1 P 2 P 3 P 4 P 5 P 6

Ultra-low power design withUltra-low power design with

MSP43

0

Error p.f.phase 2 phase 3phase 1

LCD Glass

System block diagram

Ele

ctri

city

Mea

sure

men

t

Communication UART/SPI

AutomaticCalibration

RTC+Calendar Flash 60K

Program 20K

Data Log 40K

Display Driver

FLL

16 BIT RISC MCU

Sig

nal

Pro

cess

ing

Bu

ilt in

sca

n m

em A

DC JTAG InterfacePhase 1

Phase 2

Phase 3

+Backup

32kHz

Reference meter

Diagnostics

Power control

AutomaticMeter

ReadingUnit

MSP430F44X

Ultra-low power design withUltra-low power design with

MSP43

0

Auto-range and sampling

12bitADC

_

+

+

_

V’

V’

I

Vref = 2.5V

Vref

=1/4*Vref

Vref+

Veref-

Veref+

I’

V’ V’

I

V

I

0000

4096

4096

0000

Auto range

SamplingControlPhase 1

Ultra-low power design withUltra-low power design with

MSP43

0

Signal Chain

12bitADC Phase correction

V’

i

vaveraging

I

V’X

DC extraction

Power Factor

scaling

Pulse outputReactive

Phase Angle

Active

Power

Auto range

Vref - GND

V: dc level

Energy

I: dc level

Veref+ - Veref-

Floating point

Ultra-low power design withUltra-low power design with

MSP43

0

CT phase delay compensation

Coefficients table

i

v

Phase DelayDetection

(floating point)

Z-1 k

+ AX

fractionalphase delay

P’

P

Fixed delay

I(n) = [ I(n-1) * k +I(n) ]*A Fixed delay = 60o

P’/P = cos(60+)/cos() = cos(60)-sin(60)sin()/cos()= ratio

If Q = [cos(60)-ratio]/sin(60)]

arc_cos[ square_root(1/(Q^2+1))]

Phase delay detection:FIR: fractional delay:

X

Ultra-low power design withUltra-low power design with

MSP43

0

Power measurement features

i

v

Z-1 k

+ A

fractionalphase delay

P’

P

Power Factor = cos(

Reactive Power = P tan(

Phase Angle =

Active Power = P

P

XFixed delay

X

Phase DelayDetection

(floating point)

Ultra-low power design withUltra-low power design with

MSP43

0

Calibration set up

Simple set up, need one reference meter Fully automatic calibration for each phase in turn. Compensate for 3 CT’s phase-lag. Results stored in Flash

p.f.phase 1

Ph 1 Ph 2 Ph 3

UPF Load

Power Supply

Meter underTest

ReferenceMeter

Ultra-low power design withUltra-low power design with

MSP43

0

Development Environment

JTAG InterfaceTarget System

IAR C-SPICE

Ultra-low power design withUltra-low power design with

MSP43

0

MSP-FET430P440New Development Kit for x13x / x14x family members

Complete low-cost application development tool based on integrated emulation logic emulates F433, F435, F447, F448, F449

Hardware:

• Development Board including PC parallel cable, JTAG cable, socket, F149 samples

Software:

• CD - ROM with complete documentation,IAR “KickStart” Development Environment, Simulator, Debugger, Assembler/Linker, limited C-Compiler (1KB Code),

Functionality:

• Download, Update, run and debug code from PC under JTAG control

• Programming of the Flash memory

• Full speed operation via internal Emulation Logic (3 Breakpoints possible)

Price:

• 99$ suggested resale price

TI FLASH means low cost Emulation Tools!

New

Ultra-low power design withUltra-low power design with

MSP43

0

三相电表原理图 (一 )

Ultra-low power design withUltra-low power design with

MSP43

0

三相电表原理图 (二 )

Ultra-low power design withUltra-low power design with

MSP43

0

三相电表原理图 (三 )