Rainbow Electronics 71M6542G - Manual (Page 3)

v1.1 © 2008–2011 Teridian Semiconductor Corporation 3
3.3 Fault and Reset Behavior ...................................................................................................... 85
3.3.1 Events at Power-Down .............................................................................................. 85
3.3.2 IC Behavior at Low Battery Voltage ........................................................................... 86
3.3.3 Reset Sequence ........................................................................................................ 86
3.3.4 Watchdog Timer Reset .............................................................................................. 86
3.4 Wake Up Behavior ................................................................................................................ 87
3.4.1 Wake on Hardware Events ........................................................................................ 87
3.4.2 Wake on Timer .......................................................................................................... 90
3.5 Data Flow and MPU/CE Communication ............................................................................... 91
4 Application Information ............................................................................................................... 92
4.1 Connecting 5 V Devices ........................................................................................................ 92
4.2 Direct Connection of Sensors ................................................................................................ 92
4.3 71M6541D/F Using Local Sensors ........................................................................................ 93
4.4 71M6541D/F Using 71M6x01and Current Shunts .................................................................. 94
4.5 71M6542F Using Local Sensors ............................................................................................ 95
4.6 71M6542F Using 71M6x01 and Current Shunts .................................................................... 96
4.7 Metrology Temperature Compensation .................................................................................. 97
4.7.1 Voltage Reference Precision ..................................................................................... 97
4.7.2 Temperature Coefficients for the 71M654x ................................................................ 97
4.7.3 Temperature Compensation for VREF with Local Sensors ......................................... 98
4.7.4 Temperature Compensation for VREF with Remote Sensor ....................................... 99
4.8 Connecting I
2
C EEPROMs .................................................................................................. 100
4.9 Connecting Three-Wire EEPROMs ..................................................................................... 101
4.10 UART0 (TX/RX) .................................................................................................................. 101
4.11 Optical Interface (UART1) ................................................................................................... 101
4.12 Connecting the Reset Pin .................................................................................................... 102
4.13 Connecting the Emulator Port Pins ...................................................................................... 102
4.14 Flash Programming ............................................................................................................. 104
4.14.1 Flash Programming via the ICE Port ........................................................................ 104
4.14.2 Flash Programming via the SPI Port ........................................................................ 104
4.15 MPU Firmware Library ........................................................................................................ 104
4.16 Crystal Oscillator ................................................................................................................. 104
4.17 Meter Calibration ................................................................................................................. 104
5 Firmware Interface ..................................................................................................................... 105
5.1 I/O RAM Map –Functional Order ......................................................................................... 105
5.2 I/O RAM Map – Alphabetical Order ..................................................................................... 111
5.3 CE Interface Description ..................................................................................................... 125
5.3.1 CE Program ............................................................................................................ 125
5.3.2 CE Data Format ...................................................................................................... 125
5.3.3 Constants ................................................................................................................ 125
5.3.4 Environment ............................................................................................................ 126
5.3.5 CE Calculations ....................................................................................................... 126
5.3.6 CE Front End Data (Raw Data)................................................................................ 127
5.3.7 FCE Status and Control ........................................................................................... 127
5.3.8 CE Transfer Variables ............................................................................................. 129
5.3.9 Pulse Generation..................................................................................................... 132
5.3.10 Other CE Parameters .............................................................................................. 134
5.3.11 CE Calibration Parameters ...................................................................................... 135
5.3.12 CE Flow Diagrams .................................................................................................. 136
6 Electrical Specifications ............................................................................................................ 138