78M6612-IM/F データシートの表示（PDF） - Teridian Semiconductor Corporation

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78M6612-IM/F

Single-Phase, Dual-Outlet Power and Energy Measurement IC

Teridian Semiconductor Corporation 

78M6612 Data Sheet

Table of Contents

DS_6612_001

1 Hardware Description....................................................................................................................7

1.1 Hardware Overview.................................................................................................................7

1.2 Analog Front End (AFE) .......................................................................................................... 8

1.2.1 Input Multiplexer..........................................................................................................8

1.2.2 A/D Converter (ADC)...................................................................................................9

1.2.3 FIR Filter ..................................................................................................................... 9

1.2.4 Voltage References.....................................................................................................9

1.2.5 Temperature Sensor.................................................................................................... 9

1.2.6 Battery Monitor............................................................................................................9

1.3 Digital Computation Engine (CE)........................................................................................... 10

1.3.1 Real-Time Monitor..................................................................................................... 10

1.3.2 Pulse Generator ........................................................................................................ 10

1.3.3 Data RAM (XRAM) .................................................................................................... 10

1.4 80515 MPU Core .................................................................................................................. 11

1.4.1 UARTs ...................................................................................................................... 11

1.5 On-Chip Resources............................................................................................................... 11

1.5.1 Oscillator................................................................................................................... 11

1.5.2 PLL and Internal Clocks............................................................................................. 11

1.5.3 Real-Time Clock (RTC) ............................................................................................. 12

1.5.4 Temperature Sensor.................................................................................................. 12

1.5.5 Flash Memory ........................................................................................................... 12

1.5.6 Optical Interface ........................................................................................................ 13

1.5.7 Digital I/O .................................................................................................................. 13

1.5.8 LCD Drivers .............................................................................................................. 16

1.5.9 EEPROM Interface.................................................................................................... 16

1.5.10 Hardware Watchdog Timer........................................................................................ 17

1.5.11 Test Ports (TXUXOUT pin) ........................................................................................ 17

2 Functional Description ................................................................................................................ 18

2.1 Theory of Operation .............................................................................................................. 18

2.2 Fault and Reset Behavior...................................................................................................... 19

2.2.1 Reset Mode............................................................................................................... 19

2.2.2 Power Fault Circuit .................................................................................................... 19

2.3 Data Flow ............................................................................................................................. 19

2.4 CE/MPU Communication ...................................................................................................... 20

3 Application Information............................................................................................................... 21

3.1 Connection of Sensors (CT, Resistive Shunt)........................................................................ 21

3.2 Connecting 5 V Devices........................................................................................................ 22

3.3 Temperature Measurement ................................................................................................... 22

3.4 Temperature Compensation.................................................................................................. 22

3.5 Connecting LCDs.................................................................................................................. 23

3.6 Connecting I2C EEPROMs .................................................................................................... 23

3.7 Connecting Three-Wire EEPROMs ....................................................................................... 24

3.8 UART0 (TX0/RX0) ................................................................................................................ 24

3.9 UART1 (TX1/RX1) ................................................................................................................ 25

3.10 Connecting V1 and Reset Pins.............................................................................................. 25

3.11 Connecting the Emulator Port Pins........................................................................................ 26

3.12 Flash Programming............................................................................................................... 26

3.13 MPU Firmware Library .......................................................................................................... 26

3.14 Crystal Oscillator................................................................................................................... 26

3.15 Measurement Calibration ...................................................................................................... 27

4 Electrical Specifications.............................................................................................................. 28

4.1 Absolute Maximum Ratings................................................................................................... 28

4.2 Recommended External Components ................................................................................... 29

2

Rev 2

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