71M6545 Datasheet, PDF (2/134 Pages) Maxim Integrated Products – Four-Quadrant Metering, Phase Metrology Processors Flash/RAM Size

Data Sheet 71M6545/H
PDS_6545_009
Table of Contents
1 INTRODUCTION ........................................................................................................................... 10
2 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 ................................................................ 33
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
3 Functional Description ................................................................................................................ 66
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