Rainbow Electronics 71M6542G - Manual (Page 2)

2 © 2008–2011 Teridian Semiconductor Corporation v1.1
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 ....................................................................................................... 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
3 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