71M6545 datasheet(2/133 Pages) MAXIM

2 / 133 page

71M6545/71M6545H Data Sheet

Table of Contents

Introduction ....................................................................................................................................... 10

Hardware Description ....................................................................................................................... 11

2.1

Hardware Overview ................................................................................................................... 11

2.2

Analog Front End (AFE)............................................................................................................. 12

2.2.1 Signal Input Pins ............................................................................................................ 13

2.2.2 Input Multiplexer............................................................................................................. 14

2.2.3 Delay Compensation ..................................................................................................... 19

2.2.4 ADC Pre-Amplifier ......................................................................................................... 20

2.2.5 A/D Converter (ADC) ..................................................................................................... 20

2.2.6 FIR Filter ........................................................................................................................ 20

2.2.7 Voltage References ....................................................................................................... 20

2.2.8 71M6xx3 Isolated Sensor Interface ............................................................................... 21

2.3

Digital Computation Engine (CE) ............................................................................................... 25

2.3.1 CE Program Memory ..................................................................................................... 25

2.3.2 CE Data Memory ........................................................................................................... 25

2.3.3 CE Communication with the MPU ................................................................................. 25

2.3.4 Meter Equations............................................................................................................. 26

2.3.5 Real-Time Monitor (RTM) .............................................................................................. 26

2.3.6 Pulse Generators ........................................................................................................... 26

2.3.7 CE Functional Overview ................................................................................................ 28

2.4

80515 MPU Core ....................................................................................................................... 30

2.4.1 MPU Setup Code ........................................................................................................... 30

2.4.2 80515 MPU Overview .................................................................................................... 30

2.4.3 Memory Organization and Addressing .......................................................................... 31

2.4.4 Special Function Registers (SFRs)................................................................................ 33

2.4.5 Generic 80515 Special Function Registers ................................................................... 34

2.4.6 Instruction Set ................................................................................................................ 36

2.4.7 UARTs ........................................................................................................................... 36

2.4.8 Timers and Counters ..................................................................................................... 38

2.4.9 WD Timer (Software Watchdog Timer) ......................................................................... 40

2.4.10 Interrupts........................................................................................................................ 40

2.5

On-Chip Resources ................................................................................................................... 46

2.5.1 Physical Memory............................................................................................................ 46

2.5.2 Oscillator ........................................................................................................................ 48

2.5.3 PLL and Internal Clocks................................................................................................. 48

2.5.4 Real-Time Clock (RTC) ................................................................................................. 49

2.5.5 71M6545/H Temperature Sensor .................................................................................. 53

2.5.6 71M6xx3 Temperature Sensor ...................................................................................... 54

2.5.7 71M6545/H Battery Monitor........................................................................................... 55

2.5.8 71M6xx3 VCC Monitor................................................................................................... 55

2.5.9 UART Interface .............................................................................................................. 55

2.5.10 DIO Pins......................................................................................................................... 55

2.5.11 EEPROM Interface ........................................................................................................ 57

2.5.12 SPI Slave Port................................................................................................................ 60

2.5.13 Hardware Watchdog Timer............................................................................................ 64

2.5.14 Test Ports (TMUXOUT and TMUX2OUT Pins) ............................................................. 64

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