78M6613 Data Sheet

2

Rev 3

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