GENERAL DESCRIPTION ............................................................................................................................................1
Analog Front End (AFE)...................................................................................................................................9
Theory of Operation .......................................................................................................................................47
System Timing Summary...............................................................................................................................48
Fault and Reset Behavior ..............................................................................................................................56
Wake Up Behavior .........................................................................................................................................57
Wake on PB.....................................................................................................................................57
Wake on Timer ................................................................................................................................57
Data Flow.......................................................................................................................................................58
CE/MPU Communication ...............................................................................................................................58
Temperature Measurement ...........................................................................................................................59
Temperature Compensation ..........................................................................................................................59
APPLICATION INFORMATION ...................................................................................................................................60
Connection of Sensors (CT, Resistive Shunt)................................................................................................60
Meter Calibration............................................................................................................................................67
I/O RAM MAP – In Numerical Order ..............................................................................................................68
SFR MAP (SFRs Specific to TERIDIAN 80515) – In Numerical Order ..........................................................69
I/O RAM DESCRIPTION – Alphabetical Order ..............................................................................................70
CE Interface Description ................................................................................................................................76
CE Program.....................................................................................................................................76
Figure 1: IC Functional Block Diagram...........................................................................................................................8
Figure 2: General Topology of a Chopped Amplifier ....................................................................................................11
Figure 8: Connecting an External Load to DIO Pins.....................................................................................................40
Figure 12: 3-Wire Interface. Write Command when CNT=0 .........................................................................................44
Figure 13: 3-Wire Interface. Write Command when HiZ=1 and WFR=1.......................................................................44
Figure 14: Functions defined by V1..............................................................................................................................45
Figure 15: Voltage. Current, Momentary and Accumulated Energy .............................................................................47
Figure 16: Timing Relationship between ADC MUX, Compute Engine, and Serial Transfers. .....................................48
Figure 17: RTM Output Format ....................................................................................................................................49
Figure 18: Operation Modes State Diagram.................................................................................................................50
Figure 22: Transition from BROWNOUT to MISSION Mode when System Power Returns .........................................55
Figure 23: Power-Up Timing with V3P3SYS and VBAT tied together ..........................................................................55
Figure 24: Power-Up Timing with VBAT only ...............................................................................................................56
Figure 25: Wake Up Timing..........................................................................................................................................57
Figure 26: MPU/CE Data Flow .....................................................................................................................................58
Figure 27: MPU/CE Communication ............................................................................................................................58
Figure 28: Resistive Voltage Divider (Left), Current Transformer (Right) .....................................................................60
Figure 33: Connections for the RX Pin .........................................................................................................................64
Figure 34: Connection for Optical Components ...........................................................................................................65
Figure 35: Voltage Divider for V1 .................................................................................................................................65
Figure 36: External Components for the RESET Pin: Push-Button (Left), EMI Circuit (Right) .....................................66
Figure 37: External Components for the Emulator Interface ........................................................................................66
Figure 38: Wh Accuracy, 0.1A to 200A at 240V/50Hz and Room Temperature...........................................................91
Figure 39: Meter Accuracy over Harmonics at 240V, 30A............................................................................................91
Figure 40: Typical Meter Accuracy over Temperature Relative to 25°C.......................................................................92
便携式医疗设备的特殊性决定了它们应该是对用户友好的、必须工作在无菌环境下，并且空间占用小、耗能低。 同时，便携式医疗设备还需要足够的计算能力以便处理医疗数据，能够连接到无线或有线接口以便记录和发送数据。从设计人员的角度考虑，上述需求需要低功耗的单片机（MCU）和数字信号控制器（Digital Signal Controller，DSC）。 正是有了嵌入式处理器，设计人员才有可能设...[详细]
Microchip MCU
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