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W79E825ADG Datasheet(PDF) 1 Page - Winbond |
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1 / 127 page W79E825A/824A/823B/822B Data Sheet 8-BIT MICROCONTROLLER Publication Release Date: February 21, 2008 - 1 - Revision A9 Table of Contents- 1 GENERAL DESCRIPTION ......................................................................................................... 4 2 FEATURES ................................................................................................................................. 5 3 PARTS INFORMATION LIST ..................................................................................................... 6 3.1 Lead Free (RoHS) Parts information list......................................................................... 6 4 PIN CONFIGURATION ............................................................................................................... 7 5 PIN DESCRIPTION..................................................................................................................... 8 6 FUNCTIONAL DESCRIPTION.................................................................................................... 9 6.1 On-Chip Flash EPROM .................................................................................................. 9 6.2 I/O Ports.......................................................................................................................... 9 6.3 Serial I/O ......................................................................................................................... 9 6.4 Timers ............................................................................................................................. 9 6.5 Interrupts......................................................................................................................... 9 6.6 Data Pointers .................................................................................................................. 9 6.7 Architecture................................................................................................................... 10 6.7.1 ALU ................................................................................................................................10 6.7.2 Accumulator ...................................................................................................................10 6.7.3 B Register.......................................................................................................................10 6.7.4 Program Status Word: ....................................................................................................10 6.7.5 Scratch-pad RAM ...........................................................................................................10 6.7.6 Stack Pointer ..................................................................................................................11 6.8 Power Management...................................................................................................... 11 7 MEMORY ORGANIZATION...................................................................................................... 12 7.1 Program Memory (on-chip Flash) ................................................................................. 12 7.2 Data Memory ................................................................................................................ 12 7.3 Register Map................................................................................................................. 13 7.4 Working Registers......................................................................................................... 16 7.5 Bit addressable Locations............................................................................................. 16 7.6 Stack ............................................................................................................................. 16 8 SPECIAL FUNCTION REGISTERS ......................................................................................... 17 9 INSTRUCTION SET.................................................................................................................. 48 9.1 Instruction Timing.......................................................................................................... 56 10 POWER MANAGEMENT.......................................................................................................... 59 10.1 Idle Mode ...................................................................................................................... 59 10.2 Power Down Mode ....................................................................................................... 59 11 RESET CONDITIONS............................................................................................................... 60 11.1 Sources of reset............................................................................................................ 60 11.1.1 External Reset ..............................................................................................................60 |
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