w83l950d Winbond Electronics Corp America, w83l950d Datasheet - Page 3

• Manufacturer Part Number: w83l950d
• Description: Peripheral Personal Computer Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

Tables of Contents-
1.
2.
3.
4.
5.
6.
7.
8.
GENERAL DESCRIPTION ......................................................................................................... 1
FEATURES ................................................................................................................................. 1
PIN CONFIGURATION ............................................................................................................... 3
PIN DESCRIPTION..................................................................................................................... 4
3.1.
3.2.
3.3.
SYSTEM BLOCK DIAGRAM .....................................................................................................11
MICRO COMPUTER ARCHITECTURE ................................................................................... 12
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
SPECIAL FUNCTION REGISTER ............................................................................................ 17
7.1
7.2
8051 AND BASIC CONTROL REGISTER ................................................................................ 19
8.1
8.2
8.3
8.4
8.5
Basic KBC Function Signals ........................................................................................... 5
Specific Function Signals................................................................................................ 8
Power, Rest and Clock Signals..................................................................................... 10
ALU ............................................................................................................................... 12
Accumulator .................................................................................................................. 12
B Register ..................................................................................................................... 12
Program Status Word (PSW)........................................................................................ 12
Data Pointers and Selection ......................................................................................... 12
Stack Pointer................................................................................................................. 12
Program Memory .......................................................................................................... 13
Scratch Pad RAM ......................................................................................................... 13
SFR Bit Addressable Location ...................................................................................... 15
External SRAM ............................................................................................................. 16
Scratched ULTRA ROM ................................................................................................ 16
Standard SFR Address and Registers .......................................................................... 17
Advanced SFR Address and Registers ........................................................................ 18
Stack Pointer................................................................................................................. 19
Data Pointer Low .......................................................................................................... 19
Data Pointer High.......................................................................................................... 19
Data Pointer Low1 ........................................................................................................ 19
Data Pointer High1........................................................................................................ 19
- III -
Publication Release Date: June 23, 2003
W83L950D
Revision 1.0