71m6521be Maxim Integrated Products, Inc., 71m6521be Datasheet - Page 3

• Manufacturer Part Number: 71m6521be
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

FUNCTIONAL DESCRIPTION.....................................................................................................................................47
APPLICATION INFORMATION ...................................................................................................................................60
FIRMWARE INTERFACE ............................................................................................................................................68
V1.0
Theory of Operation .......................................................................................................................................47
System Timing Summary...............................................................................................................................48
Battery Modes................................................................................................................................................49
Fault and Reset Behavior ..............................................................................................................................56
Wake Up Behavior .........................................................................................................................................57
Data Flow.......................................................................................................................................................58
CE/MPU Communication ...............................................................................................................................58
Temperature Measurement ...........................................................................................................................59
Temperature Compensation ..........................................................................................................................59
Connection of Sensors (CT, Resistive Shunt)................................................................................................60
Connecting 5V Devices..................................................................................................................................60
Connecting LCDs...........................................................................................................................................61
Connecting I
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
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
Test Ports ........................................................................................................................................46
BROWNOUT Mode .........................................................................................................................50
LCD Mode .......................................................................................................................................51
SLEEP Mode ...................................................................................................................................51
Wake on PB.....................................................................................................................................57
Wake on Timer ................................................................................................................................57
CE Program.....................................................................................................................................76
Formats ...........................................................................................................................................76
Constants ........................................................................................................................................76
Environment ....................................................................................................................................76
CE Calculations ...............................................................................................................................77
CE STATUS ....................................................................................................................................77
2
C EEPROMs ............................................................................................................................63
© 2005-2008 TERIDIAN Semiconductor Corporation
Energy Meter IC
71M6521BE
DATA SHEET
JANUARY 2008
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