Contents
1 General Description ................................................................................................ 1
2 Features ................................................................................................................... 1
3 Applications............................................................................................................. 1
4 Pin Assignment ....................................................................................................... 2
5 Pin Description ........................................................................................................ 3
6 Function Description............................................................................................... 4
6.1 PS/2 Keyboard Function Description ................................................................ 4
6.1.1 Keyboard Buffer ..................................................................................................4
6.1.2 Power-on Reset and Self Test.............................................................................4
6.1.3 Keyboard Data Output.........................................................................................4
6.1.4 Keyboard Data Input ...........................................................................................5
6.1.5 Command from the System ................................................................................5
6.1.6 System Commands .............................................................................................8
6.1.7 Keyboard Scan Code Table.................................................................................9
6.2 USB Keyboard Function Description............................................................... 19
6.2.1 USB Keyboard Description ...............................................................................19
6.2.2 LED Report for USB Keyboard .........................................................................22
6.2.3 USB Keyboard Scan Code................................................................................22
6.3 Internal-Multi Function .................................................................................... 25
7 Absolute Maximum Ratings.................................................................................. 25
8 DC Electrical Characteristics................................................................................ 25
9 AC Electrical Characteristics................................................................................ 26
10 PS/2 Timing Diagram............................................................................................. 27
11 Application Circuit................................................................................................. 28
12 Application Matrix ................................................................................................. 29
13 Pad Diagram .......................................................................................................... 30