PDS_6545_009
Data Sheet 71M6545/H
3.1 Theory of Operation..............................................................................................................66
3.2 SLP Mode (Sleep Mode).......................................................................................................67
3.3 Fault and Reset Behavior......................................................................................................68
3.3.1 Events at Power-Down ..............................................................................................68
3.3.2 Reset Sequence........................................................................................................69
3.4 Data Flow and Host Communication .....................................................................................69
Application Information...............................................................................................................71
4.1 Connecting 5 V Devices........................................................................................................71
4.2 Directly Connected Sensors..................................................................................................71
4.3 Systems Using 71M6xx3 Isolated Sensors and Current Shunts.............................................72
4.4 System Using Current Transformers .....................................................................................73
4.5 Metrology Temperature Compensation..................................................................................74
4.5.1 Distinction Between Standard and High-Precision Parts ............................................74
4.5.2 Temperature Coefficients for the 71M6545................................................................75
4.5.3 Temperature Coefficients for the 71M6545H..............................................................75
4.5.4 Temperature Coefficients for the 71M6603 and 71M6103 (1% Energy Accuracy) ......75
4.5.5 Temperature Compensation for VREF and Shunt Sensors ........................................75
4.5.6 Temperature Compensation of VREF and Current Transformers...............................77
4.6 Connecting I2C EEPROMs....................................................................................................79
4.7 Connecting Three-Wire EEPROMs .......................................................................................79
4.8 UART (TX/RX) ......................................................................................................................79
4.9 Connecting the Reset Pin......................................................................................................79
4.10 Connecting the Emulator Port Pins........................................................................................80
4.11 Flash Programming...............................................................................................................80
4.11.1 Flash Programming via the ICE Port..........................................................................80
4.11.2 Flash Programming via the SPI Port..........................................................................80
4.12 MPU Demonstration Code.....................................................................................................81
4.13 Crystal Oscillator...................................................................................................................81
4.14 Meter Calibration...................................................................................................................81
Firmware Interface.......................................................................................................................82
5.1 I/O RAM Map –Functional Order ...........................................................................................82
5.2 I/O RAM Map – Alphabetical Order .......................................................................................88
5.3 Reading the Info Page (71M6545H only)...............................................................................98
5.4 CE Interface Description .....................................................................................................100
5.4.1 CE Program ............................................................................................................100
5.4.2 CE Data Format ......................................................................................................100
5.4.3 Constants................................................................................................................100
5.4.4 Environment............................................................................................................101
5.4.5 CE Calculations.......................................................................................................101
5.4.6 CE Front End Data (Raw Data)................................................................................102
5.4.7 CE Status and Control.............................................................................................103
5.4.8 CE Transfer Variables .............................................................................................105
5.4.9 Pulse Generation.....................................................................................................107
5.4.10 CE Calibration Parameters......................................................................................110
5.4.11 CE Flow Diagrams ..................................................................................................111
71M6545/H Specifications .........................................................................................................113
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