71M6543F/H and 71M6543G/GH Data Sheet
Figures
Figure 1: IC Functional Block Diagram.....................................................................................................9
Figure 2: AFE Block Diagram (Shunts: One-Local, Three-Remotes) ......................................................12
Figure 3. AFE Block Diagram (Four CTs)...............................................................................................13
Figure 4: States in a Multiplexer Frame (MUX_DIV[3:0] = 6) ..................................................................17
Figure 5: States in a Multiplexer Frame (MUX_DIV[3:0] = 7) ..................................................................17
Figure 6: General Topology of a Chopped Amplifier...............................................................................21
Figure 7: CROSS Signal with CHOP_E = 00...........................................................................................21
Figure 8: RTM Timing............................................................................................................................26
Figure 9. Pulse Generator FIFO Timing .................................................................................................28
Figure 10: Samples from Multiplexer Cycle (Frame)...............................................................................29
Figure 11: Accumulation Interval............................................................................................................29
Figure 12: Interrupt Structure.................................................................................................................46
Figure 13: Automatic Temperature Compensation .................................................................................54
Figure 14: Optical Interface....................................................................................................................58
Figure 15: Optical Interface (UART1).....................................................................................................58
Figure 16: Connecting an External Load to DIO Pins .............................................................................60
Figure 17: LCD Waveforms ...................................................................................................................65
Figure 18: 3-wire Interface. Write Command, HiZ=0..............................................................................67
Figure 19: 3-wire Interface. Write Command, HiZ=1..............................................................................68
Figure 20: 3-wire Interface. Read Command.........................................................................................68
Figure 21: 3-Wire Interface. Write Command when CNT=0...................................................................68
Figure 22: 3-wire Interface. Write Command when HiZ=1 and WFR=1..................................................68
Figure 23: SPI Slave Port - Typical Multi-Byte Read and Write operations..............................................70
Figure 24: Voltage, Current, Momentary and Accumulated Energy.........................................................75
Figure 25: Operation Modes State Diagram ...........................................................................................76
Figure 26: MPU/CE Data Flow...............................................................................................................85
Figure 27: Resistive Voltage Divider (Voltage Sensing)..........................................................................86
Figure 28. CT with Single-Ended Input Connection (Current Sensing)....................................................86
Figure 29: CT with Differential Input Connection (Current Sensing)........................................................86
Figure 30: Differential Resistive Shunt Connections (Current Sensing)...................................................86
Figure 31: System Using Three-Remotes and One-Local (Neutral) Sensor ............................................87
Figure 32. System Using Current Transformers .....................................................................................88
Figure 33: I2C EEPROM Connection......................................................................................................94
Figure 34: Connections for UART0 ........................................................................................................94
Figure 35: Connection for Optical Components......................................................................................95
Figure 36: External Components for the RESET Pin: Push-Button (Left), Production Circuit (Right) .......96
Figure 37: External Components for the Emulator Interface ...................................................................96
Figure 38. Trim Fuse Bit Mapping........................................................................................................118
Figure 39: CE Data Flow: Multiplexer and ADC....................................................................................131
Figure 40: CE Data Flow: Scaling, Gain Control, Intermediate Variables for one Phase........................131
Figure 41: CE Data Flow: Squaring and Summation Stages.................................................................132
Figure 42: Wh Error from 200 A to 0.1 A at 60 Hz, 240 VAC ......................Error! Bookmark not defined.
Figure 43: VARh Error from 200 A to 0.1 A at 60 Hz, 240 VAC...................Error! Bookmark not defined.
Figure 44: Wh Error from 200 A to 0.1 A at Various Frequencies (0° Load angle, 240 VAC)............. Error!
Bookmark not defined.
Figure 45: 100-pin LQFP Package Outline...........................................................................................148
Figure 46: Pinout for the LQFP-100 Package.......................................................................................149
Figure 47: I/O Equivalent Circuits.........................................................................................................154
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