78M6631-IMR(2012_04) Ver la hoja de datos (PDF) - Maxim Integrated

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78M6631-IMR
(Rev.:2012_04)

3-Phase Power Measurement IC

Maxim Integrated 

78M6631 Data Sheet

DS_6631_056

Table of Contents

1 Hardware Functional Description...................................................................................................... 5

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

1.2 Device Reset................................................................................................................................ 7

1.3 Power Management..................................................................................................................... 7

1.3.1 Voltage Regulator ............................................................................................................ 7

1.3.2 Power Fault Management................................................................................................ 7

1.4 Analog Front-End (AFE) .............................................................................................................. 8

1.4.1 Analog Current and Voltage Inputs ................................................................................. 8

1.5 Digital Computation Engine (CE)................................................................................................. 9

1.6 80515 MPU Core ....................................................................................................................... 10

1.6.1 SFRs .............................................................................................................................. 10

1.7 RAM ........................................................................................................................................... 10

1.8 IORAM ....................................................................................................................................... 10

1.9 Flash .......................................................................................................................................... 10

1.9.1 Program Security ........................................................................................................... 10

1.10 Oscillator .................................................................................................................................... 11

1.11 PLL and Internal Clock Generation............................................................................................ 11

1.12 Real-Time Clock (RTC).............................................................................................................. 11

1.13 Hardware Watchdog Timer ........................................................................................................ 11

1.14 Temperature Sensor .................................................................................................................. 12

1.15 General Purpose Digital I/O ....................................................................................................... 12

1.16 D/Y Selection Pin ....................................................................................................................... 12

1.17 EEPROM Interface .................................................................................................................... 12

1.18 SPI Slave Port............................................................................................................................ 12

1.19 Test Port..................................................................................................................................... 13

1.20 UART ......................................................................................................................................... 13

1.21 In Circuit Emulator (ICE) Port .................................................................................................... 14

2 Electrical Specifications................................................................................................................... 15

2.1 Absolute Maximum Ratings ....................................................................................................... 15

2.2 Recommended External Components....................................................................................... 16

2.3 Recommended Operating Conditions........................................................................................ 16

2.4 Performance Specifications ....................................................................................................... 17

2.4.1 Input Logic Levels.......................................................................................................... 17

2.4.2 Output Logic Levels ....................................................................................................... 17

2.4.3 Power-Fault Comparator ............................................................................................... 17

2.4.4 Power Supply Monitor.................................................................................................... 18

2.4.5 Supply Current ............................................................................................................... 18

2.4.6 Crystal Oscillator............................................................................................................ 18

2.4.7 Temperature Sensor...................................................................................................... 19

2.4.8 VREF ............................................................................................................................. 19

2.4.9 ADC Converter, V3P3A Referenced ............................................................................. 20

2.5 Timing Specifications ................................................................................................................. 21

2.5.1 Flash Memory ................................................................................................................ 21

2.5.2 EEPROM Interface ........................................................................................................ 21

2.5.3 RESET ........................................................................................................................... 21

2.5.4 SPI Slave Port................................................................................................................ 22

3 Packaging .......................................................................................................................................... 23

3.1 56-Pin QFN Package ................................................................................................................. 23

3.2 Pinout ......................................................................................................................................... 23

3.2.1 56-Pin QFN Package Outline ........................................................................................ 24

3.2.2 Recommended PCB Land Pattern for the QFN-56 Package ........................................ 25

4 Pin Descriptions................................................................................................................................ 26

2

Rev 2

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