71M6533 datasheet(2/132 Pages) MAXIM

2 / 132 page

71M6533/G/H and 71M6534/H Data Sheet

FDS_6533_6534_004

Rev 2

Table of Contents

Hardware Description....................................................................................................................9

1.1 Hardware Overview...............................................................................................................9

1.2 Analog Front End (AFE)........................................................................................................9

1.2.1 Signal Input Pins .........................................................................................................9

1.2.2 Input Multiplexer........................................................................................................10

1.2.3 A/D Converter (ADC).................................................................................................11

1.2.4 FIR Filter ...................................................................................................................11

1.2.5 Voltage References...................................................................................................12

1.2.6 Temperature Sensor..................................................................................................13

1.2.7 Battery Monitor..........................................................................................................13

1.2.8 AFE Functional Description .......................................................................................13

1.3 Digital Computation Engine (CE) .......................................................................................14

1.3.1 Meter Equations ........................................................................................................15

1.3.2 Real-Time Monitor.....................................................................................................16

1.3.3 Pulse Generators ......................................................................................................16

1.3.4 Data RAM (XRAM)....................................................................................................16

1.3.5 CE Functional Overview............................................................................................17

1.3.6 Delay Compensation .................................................................................................18

1.4 80515 MPU Core..................................................................................................................19

1.4.1 Memory Organization and Addressing .......................................................................19

1.4.2 Special Function Registers (SFRs) ............................................................................21

1.4.3 Generic 80515 Special Function Registers ................................................................22

1.4.4 71M6533/71M6534-Specific Special Function Registers............................................ 25

1.4.5 Instruction Set ...........................................................................................................26

1.4.6 UARTs ......................................................................................................................26

1.4.7 Timers and Counters.................................................................................................29

1.4.8 WD Timer (Software Watchdog Timer) ......................................................................30

1.4.9 Interrupts...................................................................................................................30

1.5 On-Chip Resources.............................................................................................................37

1.5.1 Oscillator...................................................................................................................37

1.5.2 PLL and Internal Clocks.............................................................................................37

1.5.3 Real-Time Clock (RTC) .............................................................................................38

1.5.4 Temperature Sensor..................................................................................................39

1.5.5 Physical Memory.......................................................................................................39

1.5.6 Optical Interface........................................................................................................42

1.5.7 Digital I/O ..................................................................................................................42

1.5.8 LCD Drivers ..............................................................................................................46

1.5.9 Battery Monitor..........................................................................................................47

1.5.10 EEPROM Interface....................................................................................................47

1.5.11 SPI Slave Port...........................................................................................................50

1.5.12 Hardware Watchdog Timer........................................................................................53

1.5.13 Test Ports (TMUXOUT Pin) .......................................................................................54

1.5.14 V2 Comparator (71M6534/6534H Only).....................................................................54

Functional Description ................................................................................................................55

2.1 Theory of Operation............................................................................................................55

2.2 System Timing Summary....................................................................................................56

2.3 Battery Modes.....................................................................................................................57

2.3.1 BROWNOUT Mode ...................................................................................................59

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