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71M6543F Datasheet(PDF) 3 Page - Maxim Integrated Products |
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71M6543F Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 157 page 71M6543F/H and 71M6543G/GH Data Sheet v1.2 © 2008–2011 Teridian Semiconductor Corporation 3 3.1 Theory of Operation .............................................................................................................. 75 3.2 Battery Modes....................................................................................................................... 75 3.2.1 BRN Mode ................................................................................................................ 78 3.2.2 LCD Mode................................................................................................................. 78 3.2.3 SLP Mode ................................................................................................................. 79 3.3 Fault and Reset Behavior...................................................................................................... 80 3.3.1 Events at Power-Down .............................................................................................. 80 3.3.2 IC Behavior at Low Battery Voltage ........................................................................... 81 3.3.3 Reset Sequence........................................................................................................ 81 3.3.4 Watchdog Timer (WDT) Reset................................................................................... 81 3.4 Wake-Up Behavior................................................................................................................ 82 3.4.1 Wake on Hardware Events ........................................................................................ 82 3.4.2 Wake on Timer.......................................................................................................... 84 3.5 Data Flow and MPU/CE Communication ............................................................................... 84 4 Application Information............................................................................................................... 86 4.1 Connecting 5 V Devices........................................................................................................ 86 4.2 Directly Connected Sensors .................................................................................................. 86 4.3 Systems Using 71M6xx3 Isolated Sensors and Current Shunts ............................................. 87 4.4 System Using Current Transformers ..................................................................................... 88 4.5 Metrology Temperature Compensation.................................................................................. 89 4.5.1 Distinction Between Standard and High-Precision Parts ............................................ 89 4.5.2 Temperature Coefficients for the 71M6543F and 71M6543G ..................................... 90 4.5.3 Temperature Coefficients for the 71M6543H and 71M6543GH .................................. 90 4.5.4 Temperature Coefficients for the 71M6xx3................................................................. 90 4.5.5 Temperature Compensation for VREF and Shunt Sensors ........................................ 90 4.5.6 Temperature Compensation of VREF and Current Transformers ............................... 92 4.6 Connecting I 2C EEPROMs .................................................................................................... 94 4.7 Connecting Three-Wire EEPROMs ....................................................................................... 94 4.8 UART0 (TX/RX) .................................................................................................................... 94 4.9 Optical Interface (UART1) ..................................................................................................... 94 4.10 Connecting the Reset Pin...................................................................................................... 95 4.11 Connecting the Emulator Port Pins........................................................................................ 96 4.12 Flash Programming............................................................................................................... 96 4.12.1 Flash Programming via the ICE Port.......................................................................... 96 4.12.2 Flash Programming via the SPI Port .......................................................................... 96 4.13 MPU Demonstration Code..................................................................................................... 96 4.14 Crystal Oscillator................................................................................................................... 97 4.15 Meter Calibration................................................................................................................... 97 5 Firmware Interface....................................................................................................................... 98 5.1 I/O RAM Map –Functional Order ........................................................................................... 98 5.2 I/O RAM Map – Alphabetical Order ..................................................................................... 104 5.3 Reading the Info Page (71M6543H and 71M6543GH only).................................................. 118 5.4 CE Interface Description ..................................................................................................... 120 5.4.1 CE Program ............................................................................................................ 120 5.4.2 CE Data Format ...................................................................................................... 120 5.4.3 Constants................................................................................................................ 120 5.4.4 Environment............................................................................................................ 121 5.4.5 CE Calculations....................................................................................................... 121 5.4.6 CE Front-End Data (Raw Data) ............................................................................... 122 5.4.7 CE Status and Control............................................................................................. 123 |
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