FDS 6531/6532 005
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Data Sheet 71M6531D/F-71M6532D/F
Functional Description.....................................................................................................................54
2.1 Theory of Operation...................................................................................................................54
2.2 System Timing Summary...........................................................................................................55
2.3 Battery Modes............................................................................................................................56
2.3.1 BROWNOUT Mode .......................................................................................................57
2.3.2 LCD Mode......................................................................................................................58
2.3.3 SLEEP Mode .................................................................................................................58
2.4 Fault and Reset Behavior ..........................................................................................................60
2.4.1 Reset Mode....................................................................................................................60
2.4.2 Power Fault Circuit ........................................................................................................60
2.5 Wake-Up Behavior.....................................................................................................................61
2.5.1 Wake on PB...................................................................................................................61
2.5.2 Wake on Timer...............................................................................................................61
2.6 Data Flow...................................................................................................................................61
2.7 CE/MPU Communication...........................................................................................................62
Application Information....................................................................................................................63
3.1 Connection of Sensors...............................................................................................................63
3.2 Connecting 5-V Devices ............................................................................................................63
3.3 Temperature Measurement .......................................................................................................64
3.4 Temperature Compensation......................................................................................................64
3.4.1 Temperature Coefficients: .............................................................................................64
3.4.2 Temperature Compensation for VREF..........................................................................65
3.4.3 System Temperature Compensation.............................................................................65
3.4.4 Temperature Compensation for the RTC ......................................................................65
3.5 Connecting LCDs.......................................................................................................................66
3.6 Connecting I2C EEPROMs ........................................................................................................66
3.7 Connecting Three-Wire EEPROMs ...........................................................................................67
3.8 UART0 (TX/RX) .........................................................................................................................67
3.9 Optical Interface (UART1)..........................................................................................................67
3.10 Connecting the V1 Pin ...............................................................................................................68
3.11 Connecting the Reset Pin..........................................................................................................69
3.12 Connecting the Emulator Port Pins............................................................................................69
3.13 Connecting a Battery .................................................................................................................69
3.14 Flash Programming....................................................................................................................70
3.15 MPU Firmware...........................................................................................................................70
3.16 Crystal Oscillator........................................................................................................................70
3.17 Meter Calibration........................................................................................................................71
Firmware Interface............................................................................................................................72
4.1 I/O RAM and SFR Map – Functional Order...............................................................................72
4.2 I/O RAM Description – Alphabetical Order ................................................................................77
4.3 CE Interface Description............................................................................................................88
4.3.1 CE Program ...................................................................................................................88
4.3.2 CE Data Format.............................................................................................................88
4.3.3 Constants.......................................................................................................................88
4.3.4 Environment...................................................................................................................88
4.3.5 CE Calculations .............................................................................................................89
4.3.6 CE Status and Control...................................................................................................89
4.3.7 CE Transfer Variables ...................................................................................................92
4.3.8 Pulse Generation...........................................................................................................93
4.3.9 CE Calibration Parameters............................................................................................94
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TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
