Rainbow Electronics 78M6631 - Manual (Page 2)

78M6631 Data Sheet DS_6631_056
2 Rev 1
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