71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
Battery............................................................................................................................................. 43
Internal Voltages (VBIAS, VBAT, V2P5).......................................................................................... 43
Test Ports........................................................................................................................................ 44
FUNCTIONAL DESCRIPTION..................................................................................................................................... 46
Theory of Operation....................................................................................................................................... 46
System Timing Summary............................................................................................................................... 47
Data Flow....................................................................................................................................................... 49
CE/MPU Communication............................................................................................................................... 49
Fault, Reset, Power-Up.................................................................................................................................. 50
Battery Operation........................................................................................................................................... 51
Power Save Modes........................................................................................................................................ 51
Temperature Compensation .......................................................................................................................... 52
Chopping Circuitry ......................................................................................................................................... 52
Internal/External Pulse Generation and Pulse Counting ................................................................................ 54
Program Security........................................................................................................................................... 55
FIRMWARE INTERFACE ............................................................................................................................................ 56
I/O RAM MAP – In Numerical Order .............................................................................................................. 56
SFR MAP (SFRs Specific to TERIDIAN 80515) – In Numerical Order .......................................................... 57
I/O RAM (Configuration RAM) – Alphabetical Order...................................................................................... 58
CE Program and Environment ....................................................................................................................... 64
CE Program..................................................................................................................................... 64
Formats ........................................................................................................................................... 64
Constants ........................................................................................................................................ 64
Environment .................................................................................................................................... 65
CE Calculations............................................................................................................................... 65
CE RAM Locations......................................................................................................................................... 66
CE Front End Data (Raw Data) ....................................................................................................... 66
CE Status Word............................................................................................................................... 66
CE Transfer Variables ..................................................................................................................... 67
TYPICAL PERFORMANCE DATA............................................................................................................................... 74
Wh Accuracy at Room Temperature.............................................................................................................. 74
VARh Accuracy at Room Temperature.......................................................................................................... 74
Harmonic Performance.................................................................................................................................. 75
Meter Accuracy over Temperature (71M6511H)............................................................................................ 75
APPLICATION INFORMATION ................................................................................................................................... 76
Connection of Sensors (CT, Resistive Shunt, Rogowski Coil) ....................................................................... 76
Distinction between 71M6511 and 71M6511H Parts ..................................................................................... 76
Temperature Compensation and Mains Frequency Stabilization for the RTC ............................................... 77
External Temperature Compensation ............................................................................................................ 78
Temperature Measurement ........................................................................................................................... 78
Connecting LCDs........................................................................................................................................... 79
Connecting I2C EEPROMs............................................................................................................................ 80
Connecting 5V Devices.................................................................................................................................. 80
Optical Interface............................................................................................................................................. 81
Connecting V1 and Reset Pins ...................................................................................................................... 81
Flash Programming........................................................................................................................................ 82
MPU Firmware Library................................................................................................................................... 82
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