71M6541F datasheet(2/166 Pages) MAXIM

2 / 166 page

71M6541D/F/G and 71M6542F/G Data Sheet

Rev 2

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 ....................................................................................................... 14

2.2.2 Input Multiplexer........................................................................................................ 15

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 71M6x01 Isolated Sensor Interface (Remote Sensor Interface).................................. 22

2.3

Digital Computation Engine (CE)........................................................................................... 24

2.3.1 CE Program Memory................................................................................................. 24

2.3.2 CE Data Memory....................................................................................................... 24

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

2.3.4 Meter Equations ........................................................................................................ 25

2.3.5 Real-Time Monitor (RTM) .......................................................................................... 25

2.3.6 Pulse Generators ...................................................................................................... 27

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

2.4

80515 MPU Core .................................................................................................................. 31

2.4.1 Memory Organization and Addressing ....................................................................... 31

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

2.4.3 Generic 80515 Special Function Registers ................................................................ 34

2.4.4 Instruction Set ........................................................................................................... 36

2.4.5 UARTs ...................................................................................................................... 36

2.4.6 Timers and Counters ................................................................................................. 39

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

2.4.8 Interrupts................................................................................................................... 40

2.5

On-Chip Resources............................................................................................................... 48

2.5.1 Physical Memory ....................................................................................................... 48

2.5.2 Oscillator................................................................................................................... 50

2.5.3 PLL and Internal Clocks............................................................................................. 50

2.5.4 Real-Time Clock (RTC) ............................................................................................. 51

2.5.5 71M654x Temperature Sensor .................................................................................. 56

2.5.6 71M654x Battery Monitor........................................................................................... 57

2.5.7 UART and Optical Interface....................................................................................... 58

2.5.8 Digital I/O and LCD Segment Drivers......................................................................... 59

2.5.9 EEPROM Interface.................................................................................................... 70

2.5.10 SPI Slave Port........................................................................................................... 73

2.5.11 Hardware Watchdog Timer........................................................................................ 78

2.5.12 Test Ports (TMUXOUT and TMUX2OUT Pins)........................................................... 78

Functional Description ................................................................................................................ 80

3.1

Theory of Operation .............................................................................................................. 80

3.2

Battery Modes....................................................................................................................... 81

3.2.1 BRN Mode ................................................................................................................ 83

3.2.2 LCD Mode................................................................................................................. 83

3.2.3 SLP Mode ................................................................................................................. 84

71M6541F Datasheet(PDF) 2 Page - Maxim Integrated Products

71M6541F Datasheet(HTML) 2 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL