EKK8011AB Ver la hoja de datos (PDF) - ELAN Microelectronics

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EKK8011AB

USB & PS/2 Keyboard Encoder

ELAN Microelectronics 

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

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