71m6521fe Maxim Integrated Products, Inc., 71m6521fe Datasheet - Page 2

• Manufacturer Part Number: 71m6521fe
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

Table of Contents
GENERAL DESCRIPTION ............................................................................................................................................1
HARDWARE DESCRIPTION.........................................................................................................................................9
Page: 2 of 101
FEATURES......................................................................................................................................................1
Hardware Overview..........................................................................................................................................9
Analog Front End (AFE)...................................................................................................................................9
Digital Computation Engine (CE) ...................................................................................................................12
80515 MPU Core ...........................................................................................................................................16
On-Chip Resources .......................................................................................................................................37
Input Multiplexer ................................................................................................................................9
A/D Converter (ADC) .......................................................................................................................10
FIR Filter..........................................................................................................................................10
Voltage References .........................................................................................................................10
Temperature Sensor........................................................................................................................11
Battery Monitor ................................................................................................................................12
Functional Description .....................................................................................................................12
Meter Equations ..............................................................................................................................13
Real-Time Monitor ...........................................................................................................................14
Pulse Generator ..............................................................................................................................14
CE Functional Overview ..................................................................................................................14
Memory Organization ......................................................................................................................16
Special Function Registers (SFRs)..................................................................................................18
Special Function Registers (Generic 80515 SFRs) .........................................................................19
Special Function Registers Specific to the 71M6521DE/FE ............................................................21
Instruction Set..................................................................................................................................22
UART...............................................................................................................................................22
Timers and Counters .......................................................................................................................25
WD Timer (Software Watchdog Timer)............................................................................................27
Interrupts .........................................................................................................................................29
Oscillator..........................................................................................................................................37
PLL and Internal Clocks...................................................................................................................37
Real-Time Clock (RTC) ...................................................................................................................37
Temperature Sensor........................................................................................................................37
Physical Memory .............................................................................................................................38
Optical Interface ..............................................................................................................................39
Digital I/O.........................................................................................................................................39
LCD Drivers .....................................................................................................................................41
Battery Monitor ................................................................................................................................42
EEPROM Interface ..........................................................................................................................42
Hardware Watchdog Timer..............................................................................................................45
© 2005-2008 TERIDIAN Semiconductor Corporation
71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
v1.0