71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
Test Ports........................................................................................................................................46
FUNCTIONAL DESCRIPTION.....................................................................................................................................47
Theory of Operation.......................................................................................................................................47
System Timing Summary...............................................................................................................................48
Battery Modes................................................................................................................................................49
BROWNOUT Mode .........................................................................................................................50
LCD Mode .......................................................................................................................................51
SLEEP Mode...................................................................................................................................51
Fault and Reset Behavior ..............................................................................................................................56
Wake Up Behavior.........................................................................................................................................57
Wake on PB.....................................................................................................................................57
Wake on Timer ................................................................................................................................57
Data Flow.......................................................................................................................................................58
CE/MPU Communication...............................................................................................................................58
Temperature Measurement ...........................................................................................................................59
Temperature Compensation ..........................................................................................................................59
APPLICATION INFORMATION ...................................................................................................................................60
Connection of Sensors (CT, Resistive Shunt)................................................................................................60
Connecting 5V Devices..................................................................................................................................60
Connecting LCDs...........................................................................................................................................61
Connecting I2C EEPROMs ............................................................................................................................63
Connecting Three-Wire EEPROMs................................................................................................................63
UART0 (TX/RX).............................................................................................................................................64
Optical Interface.............................................................................................................................................64
Connecting V1 and Reset Pins ......................................................................................................................65
Connecting the Emulator Port Pins................................................................................................................66
Crystal Oscillator............................................................................................................................................67
Flash Programming........................................................................................................................................67
MPU Firmware Library...................................................................................................................................67
Meter Calibration............................................................................................................................................67
FIRMWARE INTERFACE ............................................................................................................................................68
I/O RAM MAP – In Numerical Order..............................................................................................................68
SFR MAP (SFRs Specific to TERIDIAN 80515) – In Numerical Order ..........................................................69
I/O RAM DESCRIPTION – Alphabetical Order..............................................................................................70
CE Interface Description................................................................................................................................76
CE Program.....................................................................................................................................76
Formats ...........................................................................................................................................76
Constants ........................................................................................................................................76
Environment ....................................................................................................................................76
CE Calculations...............................................................................................................................77
CE STATUS ....................................................................................................................................77
V1.0
© 2005-2008 TERIDIAN Semiconductor Corporation
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