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W79E225A Datasheet

  • W79E225A

  • 8-bit Microcontroller

  • 200頁(yè)

  • WINBOND

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PRELIMINARY W79E225A/227A DATA SHEET
8-bit Microcontroller
Table of Contents-
1.
2.
3.
4.
5.
6.
GENERAL DESCRIPTION ......................................................................................................... 5
FEATURES ................................................................................................................................. 6
PARTS INFORMATION LIST ..................................................................................................... 7
3.1
Lead Free (RoHS) Parts information list......................................................................... 7
PIN CONFIGURATION ............................................................................................................... 8
PIN DESCRIPTION................................................................................................................... 10
5.1
Port 4 ............................................................................................................................ 12
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 Memory ............................................................................................. 14
6.4.1
Operation........................................................................................................................19
7.
8.
SPECIAL FUNCTION REGISTERS ......................................................................................... 21
INSTRUCTION SET.................................................................................................................. 74
8.1
Instruction Timing.......................................................................................................... 82
8.1.1
External Data Memory Access Timing............................................................................84
9.
10.
POWER MANAGEMENT.......................................................................................................... 87
9.1
Idle Mode ...................................................................................................................... 87
9.2
Power Down Mode ....................................................................................................... 87
RESET CONDITIONS............................................................................................................... 89
10.1 Sources of reset............................................................................................................ 89
10.1.1
10.1.2
10.1.3
External Reset ..............................................................................................................89
Power-On Reset (POR)................................................................................................89
Watchdog Timer Reset.................................................................................................89
11.
10.2 Reset State ................................................................................................................... 90
INTERRUPTS ........................................................................................................................... 91
11.1 Interrupt Sources .......................................................................................................... 91
11.2 Priority Level Structure ................................................................................................. 91
11.2.1
Response Time ............................................................................................................95
12.
PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 96
12.1 Timer/Counters 0 & 1.................................................................................................... 96
12.1.1
12.1.2
12.1.3
12.1.4
12.1.5
Time-Base Selection ....................................................................................................96
Mode 0 .........................................................................................................................96
Mode 1 .........................................................................................................................97
Mode 2 .........................................................................................................................97
Mode 3 .........................................................................................................................98
-1-
Publication Release Date: December 14, 2007
Revision A2.0

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