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W79E226APG Datasheet(PDF) 1 Page - Winbond |
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W79E226APG Datasheet(HTML) 1 Page - Winbond |
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1 / 203 page  PRELIMINARY W79E225A/226A/227A DATA SHEET 8-bit Microcontroller Publication Release Date: April 15, 2008 - 1 - Revision A4.0 Table of Contents- 1. GENERAL DESCRIPTION ......................................................................................................... 5 2. FEATURES ................................................................................................................................. 6 3. PARTS INFORMATION LIST ..................................................................................................... 7 3.1 Lead Free (RoHS) Parts information list......................................................................... 7 4. PIN CONFIGURATION ............................................................................................................... 8 5. PIN DESCRIPTION................................................................................................................... 10 5.1 Port 4 ............................................................................................................................ 12 6. MEMORY ORGANIZATION...................................................................................................... 13 6.1 Program Memory (on-chip Flash) ................................................................................. 13 6.2 Data Memory ................................................................................................................ 13 6.3 Auxiliary SRAM ............................................................................................................. 14 6.4 NVM Data Flash............................................................................................................ 14 6.4.1 Operation........................................................................................................................19 7. SPECIAL FUNCTION REGISTERS ......................................................................................... 21 8. INSTRUCTION SET.................................................................................................................. 74 8.1 Instruction Timing.......................................................................................................... 84 8.1.1 External Data Memory Access Timing............................................................................86 9. POWER MANAGEMENT.......................................................................................................... 89 9.1 Idle Mode ...................................................................................................................... 89 9.2 Power Down Mode ....................................................................................................... 89 10. RESET CONDITIONS............................................................................................................... 91 10.1 Sources of reset............................................................................................................ 91 10.1.1 External Reset ..............................................................................................................91 10.1.2 Power-On Reset (POR)................................................................................................91 10.1.3 Watchdog Timer Reset.................................................................................................91 10.2 Reset State ................................................................................................................... 92 11. INTERRUPTS ........................................................................................................................... 93 11.1 Interrupt Sources .......................................................................................................... 93 11.2 Priority Level Structure ................................................................................................. 93 11.2.1 Response Time ............................................................................................................97 12. PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 98 12.1 Timer/Counters 0 & 1.................................................................................................... 98 12.1.1 Time-Base Selection ....................................................................................................98 12.1.2 Mode 0 .........................................................................................................................98 12.1.3 Mode 1 .........................................................................................................................99 12.1.4 Mode 2 .........................................................................................................................99 12.1.5 Mode 3 .......................................................................................................................100 |
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