General Description

The eKK8011A/eKK8011B series are high performance CMOS microcontroller devices specially designed for keyboard encoder applications. These devices function both in USB and PS/2 interface environment. For PS/2 interface, it supports IBM PC AT and all compatible machines and provides a 16-character first-in-first-out buffer in which data is stored. For USB interface, it supports the USB standard request version 1.1 as well as HID class request version 1.1.

Features

■ USB Specification Compliance

• Universal Serial Bus Specification Version 1.1

• USB Device Class Definition for Human Interface Device (HID), Firmware Specification Version 1.1

■ Low cost : no external components required

■ Operating frequency: 6MHz

■ Phantom key detection

■ Support scan code Set 1, 2 and 3 for PS/2

■ Support HID Usage ID for USB

■ Support PC PS/2 and USB keyboard

■ Support USB Sleep Mode

■ Low power CMOS device technology

■ Internal pull-up resistor

■ Tri-state outputs for easy board application

■ Support Windows1 TM 95, 98, 2000, ME keys

■ Support multi-media or other special application keyboard encoder

Applications

■ USB Keyboard only

■ Both USB and PS/2 compatible Keyboards