71M6521DE Datasheet, PDF (2/107 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521DE/DH/FE Data Sheet
Table of Contents
GENERAL DESCRIPTION ........................................................................................................................ 1
FEATURES ................................................................................................................................................ 1
HARDWARE DESCRIPTION..................................................................................................................... 10
Hardware Overview ..................................................................................................................... 10
Analog Front End (AFE)............................................................................................................... 10
Input Multiplexer ............................................................................................................ 10
A/D Converter (ADC) ..................................................................................................... 11
FIR Filter........................................................................................................................ 11
Voltage References ....................................................................................................... 11
Temperature Sensor...................................................................................................... 12
Battery Monitor .............................................................................................................. 13
Functional Description ................................................................................................... 13
Digital Computation Engine (CE) ................................................................................................. 13
Meter Equations ............................................................................................................ 14
Description ................................................................................................................................... 14
Real-Time Monitor ......................................................................................................... 15
Pulse Generator ............................................................................................................ 15
CE Functional Overview ................................................................................................ 15
80515 MPU Core ........................................................................................................... 17
Memory Organization .................................................................................................... 17
Special Function Registers (SFRs)................................................................................ 19
Special Function Registers (Generic 80515 SFRs) ....................................................... 20
Special Function Registers Specific to the 71M6521DE/DH/FE .................................... 22
Instruction Set................................................................................................................ 23
UART............................................................................................................................. 23
Timers and Counters ..................................................................................................... 25
WD Timer (Software Watchdog Timer).......................................................................... 28
Interrupts ....................................................................................................................... 30
On-Chip Resources ..................................................................................................................... 38
Oscillator ....................................................................................................................... 38
PLL and Internal Clocks ................................................................................................ 38
Real-Time Clock (RTC) ................................................................................................. 38
Temperature Sensor...................................................................................................... 38
Physical Memory ........................................................................................................... 39
Optical Interface ............................................................................................................ 40
Digital I/O....................................................................................................................... 40
LCD Drivers ................................................................................................................... 42
Battery Monitor .............................................................................................................. 42
EEPROM Interface ........................................................................................................ 43
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