8-BIT MICROCONTROLLER

www.DataSheet4U.com Preliminary W79E834 Data Sheet 8-BIT MICROCONTROLLER Table of Contents1. 2. 3. 4. 5. GENERAL DESCRIPTION ......................................................................................................... 4 FEATURES ................................................................................................................................. 4 PARTS INFORMATION LIST ..................................................................................................... 5 3.1 Lead Free (RoHS) Parts information list......................................................................... 5 PIN CONFIGURATION ............................................................................................................... 6 FUNCTIONAL DESCRIPTION ................................................................................................... 8 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 6. 6.1 6.2 6.3 6.4 6.5 6.6 7. 7.1 7.2 8. 9. 8.1 9.1 9.2 10. 10.1 10.2 On-Chip Flash EPROM .................................................................................................. 8 I/O Ports.......................................................................................................................... 8 Serial I/O ......................................................................................................................... 8 Timers ............................................................................................................................. 8 Interrupts......................................................................................................................... 9 Data Pointers .................................................................................................................. 9 Architecture..................................................................................................................... 9 Power Management...................................................................................................... 10 Program Memory .......................................................................................................... 11 Data Memory ................................................................................................................ 11 Register Map ................................................................................................................ 12 Working Registers ........................................................................................................ 14 Bit addressable Locations ............................................................................................ 14 Stack ............................................................................................................................. 14 SFR Location Table ...................................................................................................... 15 SFR Detail Bit Descriptions .......................................................................................... 16 INSTRUCTION TIMING................................................................................................ 44 Idle Mode ...................................................................................................................... 48 Power Down Mode ....................................................................................................... 48 External Reset .............................................................................................................. 49 Power-On Reset (POR) ................................................................................................ 49 Publication Release Date: October 12, 2006 Revision A13 PIN DESCRIPTION ................................................................................................................................. 7 MEMORY ORGANIZATION ..................................................................................................... 11 SPECIAL FUNCTION REGISTERS ......................................................................................... 15 INSTRUCTION.......................................................................................................................... 44 POWER MANAGEMENT.......................................................................................................... 48 RESET CONDITIONS............................................................................................................... 49 -1- Preliminary W79E834 Data Sheet 10.3 10.4 10.5 11. 11.1 11.2 11.3 11.4 12. 12.1 12.2 12.3 12.4 12.5 12.6 13. 13.1 13.2 14. 14.1 14.2 14.3 15. 15.1 15.2 15.3 15.4 15.5 15.6 16. 16.1 16.2 16.3 17. 18. 19. Watchdog Timer Reset ................................................................................................. 49 S/W reset ...................................................................................................................... 49 Reset State ................................................................................................................... 49 Interrupt Sources .......................................................................................................... 51 Priority Level Structure ................................................................................................. 52 Interrupt Response Time .............................................................................................. 55 Interrupt Inputs.............................................................................................................. 55 TIMER/COUNTERS 0 & 1 ............................................................................................ 57 Time-Base Selection..................................................................................................... 57 MODE 0 ........................................................................................................................ 57 MODE 1 ........................................................................................................................ 58 MODE 2 ........................................................................................................................ 59 MODE 3 ........................................................................................................................ 59 WATCHDOG CONTROL.............................................................................................. 62 CLOCK CONTROL of Watchdog ................................................................................. 63 Capture Mode ............................................................................................................... 64 Compare Mode ............................................................................................................. 69 Reload Mode ................................................................................................................ 69 MODE 0 ........................................................................................................................ 70 MODE 1 ........................................................................................................................ 71 MODE 2 ........................................................................................................................ 73 MODE 3 ........................................................................................................................ 74 Framing Error Detection ............................................................................................... 75 Multiprocessor Communications .................................................................................. 75 General descriptions..................................................................................................... 77 Block descriptions......................................................................................................... 77 Functional descriptions ................................................................................................. 78 INTERRUPTS ........................................................................................................................... 51 PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 57 WATCHDOG TIMER................................................................................................................. 61 TIMER2/INPUT CAPTURE MODULES .................................................................................... 64 SERIAL PORT (UART) ............................................................................................................. 70 SERIAL PHERIPHERAL INTERFACE (SPI) ............................................................................ 77 TIMED ACCESS PROTECTION .............................................................................................. 88 KEYBOARD INTERRUPT (KBI) ............................................................................................... 90 I/O PORT CONFIGURATION ................................................................................................... 91 19.1 Quasi-Bidirectional Output Configuration ..................................................................... 91 -2- Preliminary W79E834 Data Sheet 19.2 19.3 20. 20.1 20.2 20.3 21. 21.1 21.2 22. 23. 24. 25. Open Drain Output Configuration ................................................................................. 92 Push-Pull Output Configuration .................................................................................... 92 On-Chip RC Oscillator Option ...................................................................................... 94 External Clock Input Option .......................................................................................... 94 CPU Clock Rate select .............................................