W79E825A Datasheet, PDF (1/127 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E825A/824A/823B/822B Data Sheet
8-BIT MICROCONTROLLER
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
Publication Release Date: February 21, 2008
-1-
Revision A9