71M6534 datasheet(3/132 Pages) MAXIM | Exceeds IEC 62053/ANSI C12.20 Standards

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FDS_6533_6534_004

71M6533/G/H and 71M6534/H Data Sheet

Rev 2

2.3.2 LCD Mode.................................................................................................................59

2.3.3 SLEEP Mode.............................................................................................................59

2.4 Fault and Reset Behavior ...................................................................................................65

2.4.1 Reset Mode...............................................................................................................65

2.4.2 Power Fault Circuit....................................................................................................65

2.5 Wake Up Behavior...............................................................................................................65

2.5.1 Wake on PB..............................................................................................................65

2.5.2 Wake on Timer..........................................................................................................66

2.6 Data Flow.............................................................................................................................66

2.7 CE/MPU Communication ....................................................................................................67

Application Information...............................................................................................................68

3.1 Connection of Sensors (CT, Resistive Shunt) ...................................................................68

3.2 Distinction between 71M6533/71M6534 and 71M6533G/H/71M6534H Parts..................... 68

3.3 Connecting 5 V Devices......................................................................................................69

3.4 Temperature Measurement.................................................................................................69

3.5 Temperature Compensation...............................................................................................69

3.5.1 Temperature Coefficients ..........................................................................................69

3.5.2 Temperature Compensation for VREF.......................................................................71

3.5.3 System Temperature Compensation..........................................................................72

3.5.4 Temperature Compensation for the RTC ...................................................................72

3.6 Connecting LCDs................................................................................................................72

3.7 Connecting I2C EEPROMs ..................................................................................................73

3.8 Connecting Three-Wire EEPROMs.....................................................................................73

3.9 UART0 (TX/RX)....................................................................................................................74

3.10 Optical Interface (UART1)...................................................................................................74

3.11 Connecting the V1 Pin ........................................................................................................75

3.12 Connecting the Reset Pin...................................................................................................75

3.13 Connecting the Emulator Port Pins....................................................................................76

3.14 Connecting a Battery ..........................................................................................................76

3.15 Flash Programming ............................................................................................................77

3.16 MPU Firmware Library ........................................................................................................77

3.17 Crystal Oscillator ................................................................................................................77

3.18 Meter Calibration.................................................................................................................78

Firmware Interface.......................................................................................................................79

4.1 I/O RAM and SFR Map –Functional Order..........................................................................79

4.2 I/O RAM Description – Alphabetical Order.........................................................................83

4.3 CE Interface Description.....................................................................................................95

4.3.1 CE Program ..............................................................................................................95

4.3.2 CE Data Format ........................................................................................................95

4.3.3 Constants..................................................................................................................95

4.3.4 Environment..............................................................................................................96

4.3.5 CE Calculations.........................................................................................................97

4.3.6 CE Front End Data (Raw Data)..................................................................................97

4.3.7 CE Status and Control...............................................................................................98

4.3.8 CE Transfer Variables .............................................................................................100

4.3.9 Temperature Measurement and Temperature Compensation .................................. 102

4.3.10 Pulse Generation.....................................................................................................102

4.3.11 Noise Suppression and Version Parameters............................................................ 104

4.3.12 CE Calibration Parameters......................................................................................104

4.3.13 CE Flow Diagrams ..................................................................................................105

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