71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
Table of Contents
GENERAL DESCRIPTION .......................................................................................................................................... 1
FEATURES.................................................................................................................................................... 1
HARDWARE DESCRIPTION....................................................................................................................................... 8
Hardware Overview........................................................................................................................................ 8
Analog Front End (AFE)................................................................................................................................. 8
Multiplexer ....................................................................................................................................... 8
ADC................................................................................................................................................. 9
FIR Filter.......................................................................................................................................... 9
Voltage Reference........................................................................................................................... 9
Temperature Sensor........................................................................................................................ 10
Functional Description ..................................................................................................................... 10
Computation Engine (CE).............................................................................................................................. 11
Meter Equations .............................................................................................................................. 12
Pulse Generator .............................................................................................................................. 12
Real-Time Monitor........................................................................................................................... 13
CE Functional Overview .................................................................................................................. 13
80515 MPU Core ........................................................................................................................................... 15
80515 Overview............................................................................................................................... 15
Memory Organization ...................................................................................................................... 15
Special Function Registers (SFRs).................................................................................................. 17
Special Function Registers (Generic 80515 SFRs) ......................................................................... 18
Special Function Registers Specific to the 71M6511....................................................................... 20
Instruction Set.................................................................................................................................. 21
UART............................................................................................................................................... 21
Timers and Counters....................................................................................................................... 24
WD Timer (Software Watchdog Timer)............................................................................................ 26
Interrupts ......................................................................................................................................... 29
External Interrupts ........................................................................................................................... 31
Interrupt Priority Level Structure...................................................................................................... 33
Interrupt Sources and Vectors......................................................................................................... 34
On-Chip Resources ....................................................................................................................................... 36
DIO Ports......................................................................................................................................... 36
Physical Memory ............................................................................................................................. 37
Oscillator.......................................................................................................................................... 38
Real-Time Clock (RTC) ................................................................................................................... 39
LCD Drivers..................................................................................................................................... 39
LCD Voltage Boost Circuitry............................................................................................................ 40
UART (UART0) and Optical Port (UART1)...................................................................................... 40
Hardware Reset Mechanisms.......................................................................................................... 41
Reset Pin (RESETZ) ....................................................................................................................... 41
Hardware Watchdog Timer.............................................................................................................. 41
Crystal Frequency Monitor............................................................................................................... 41
V1 Pin.............................................................................................................................................. 41
I2C Interface (EEPROM)................................................................................................................. 42
Internal Clocks and Clock Dividers.................................................................................................. 43
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