78M6613 Data Sheet

DS_6613_018

2

Rev 2

Tab

le of Contents

1

Hardware Description....................................................................................................................5

1.1 Hardware Overview ................................................................................................................5

1.2 Analog Front End (AFE)..........................................................................................................6

1.2.1 Input Multiplexer..........................................................................................................6

1.2.2 A/D Converter (ADC) ..................................................................................................6

1.2.3 FIR Filter.....................................................................................................................6

1.2.4 Voltage References.....................................................................................................6

1.2.5 Temperature Sensor ...................................................................................................7

1.2.6 Functional Description.................................................................................................7

1.3 Digital Computation Engine (CE) ............................................................................................8

1.4 80515 MPU Core ....................................................................................................................8

1.4.1 UART..........................................................................................................................8

1.4.2 Timers and Counters...................................................................................................9

1.5 On-Chip Resources.................................................................................................................9

1.5.1 Oscillator.....................................................................................................................9

1.5.2 PLL and Internal Clocks ..............................................................................................9

1.5.3 Temperature Sensor ...................................................................................................9

1.5.4 Flash Memory .............................................................................................................9

1.5.5 Digital I/O..................................................................................................................10

1.5.6 Hardware Watchdog Timer........................................................................................10

1.5.7 Program Security ......................................................................................................10

1.5.8 Test Ports..................................................................................................................10

2

Functional Description................................................................................................................11

2.1 Theory of Operation..............................................................................................................11

2.2 Reset Behavior .....................................................................................................................12

2.3 Data Flow .............................................................................................................................12

2.4 CE/MPU Communication......................................................................................................13

3

Application Information ..............................................................................................................14

3.1 Connection of Sensors (CT, Resistive Shunt)........................................................................14

3.2 Temperature Measurement...................................................................................................15

3.3 Temperature Compensation..................................................................................................15

3.4 Connecting 5V Devices.........................................................................................................16

3.5 UART (TX/RX) ......................................................................................................................16

3.6 Reset Function and Reset Pin Connections...........................................................................16

3.7 Connecting the Emulator Port Pins .......................................................................................18

3.8 Crystal Oscillator...................................................................................................................19

3.9 Flash Programming ..............................................................................................................19

3.10 MPU Firmware Library ..........................................................................................................19

3.11 Measurement Calibration......................................................................................................19

4

Electrical Specifications .............................................................................................................20

4.1 Absolute Maximum Ratings ..................................................................................................20

4.2 Recommended External Components...................................................................................21

4.3 Recommended Operating Conditions....................................................................................21

4.4 Performance Specifications ..................................................................................................21

4.4.1 Input Logic Levels .....................................................................................................21

4.4.2 Output Logic Levels ..................................................................................................21

4.4.3 Supply Current ..........................................................................................................22

4.4.4 Crystal Oscillator.......................................................................................................22

4.4.5 VREF ........................................................................................................................22

4.4.6 ADC Converter, V3P3 Referenced ............................................................................23

4.4.7 Temperature Sensor .................................................................................................23