78M6631 Maxim, 78M6631 Datasheet - Page 2

• Manufacturer Part Number: 78M6631
• Description: The Teridian™ 78M6631 is a highly integrated 3-phase power measurement and monitoring system-on-chip (SoC), with a 10MHz 8051-compatible MPU core and Single Converter Technology® containing a 22-bit deltasigma converter and 32-bit compute e
• Manufacturer: Maxim

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Hardware Functional Description ................................................................................................. 5
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
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
Electrical Specifications .............................................................................................................. 15
2.1
2.2
2.3
2.4
2.5
Packaging .................................................................................................................................... 23
3.1
3.2
Pin Descriptions .......................................................................................................................... 26
Hardware Overview................................................................................................................. 5
Device Reset .......................................................................................................................... 7
Power Management ................................................................................................................ 7
Analog Front-End (AFE) .......................................................................................................... 8
Digital Computation Engine (CE) ............................................................................................. 9
80515 MPU Core .................................................................................................................. 10
RAM ..................................................................................................................................... 10
IORAM .................................................................................................................................. 10
Flash..................................................................................................................................... 10
Absolute Maximum Ratings ................................................................................................... 15
Recommended External Components ................................................................................... 16
Recommended Operating Conditions .................................................................................... 16
Performance Specifications ................................................................................................... 17
Timing Specifications ............................................................................................................ 21
56-Pin QFN Package ............................................................................................................ 23
Pinout ................................................................................................................................... 23
1.3.1 Voltage Regulator........................................................................................................ 7
1.3.2 Power Fault Management ............................................................................................ 7
1.4.1 Analog Current and Voltage Inputs .............................................................................. 8
1.6.1 SFRs ......................................................................................................................... 10
1.9.1 Program Security....................................................................................................... 10
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
2.5.1 Flash Memory ........................................................................................................... 21
2.5.2 EEPROM Interface .................................................................................................... 21
2.5.3 RESET ...................................................................................................................... 21
2.5.4 SPI Slave Port ........................................................................................................... 22
3.2.1 56-Pin QFN Package Outline ..................................................................................... 24
3.2.2 Recommended PCB Land Pattern for the QFN-56 Package ...................................... 25
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