Datasheet
71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 2 of 98 © 2005–2010 Teridian Semiconductor Corporation V2.7
A Maxim Integrated Products Brand
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 ...................................................................................................................... 32
Interrupt Priority Level Structure .................................................................................................. 34
Interrupt Sources and Vectors ..................................................................................................... 35
On-Chip Resources .................................................................................................................................. 37
DIO Ports ................................................................................................................................... 37
Physical Memory ........................................................................................................................ 38
Oscillator .................................................................................................................................... 39
Real-Time Clock (RTC)............................................................................................................... 40
LCD Drivers ............................................................................................................................... 40
LCD Voltage Boost Circuitry........................................................................................................ 41
UART (UART0) and Optical Port (UART1)................................................................................... 41
Hardware Reset Mechanisms ..................................................................................................... 42
Reset Pin (RESETZ)................................................................................................................... 42
Hardware Watchdog Timer ......................................................................................................... 42
Crystal Frequency Monitor .......................................................................................................... 42
V1 Pin ........................................................................................................................................ 42
I2C Interface (EEPROM) ............................................................................................................ 43
Internal Clocks and Clock Dividers .............................................................................................. 44
Battery ....................................................................................................................................... 44
Internal Voltages (VBIAS, VBAT, V2P5) ...................................................................................... 44
Test Ports .................................................................................................................................. 44