General Description

The eKK8011A/eKK8011B microcontroller is dedicated to an USB & PS/2 keyboard encoder ,specially designed for IBM PC AT and all compatible machines. The eKK8011A/eKK8011B controls all scan codes, three LEDs status, scan timing and communications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external components. The Body of eKK8011A is EM78M611, and the body of eKK8011B is EM78611.

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 - eliminate need external components.

■ Run at 6MHz frequency

■ Phantom key detects.

■ 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 WINDOWS TM 95, 98, 2000, ME keys.

■ Support multi-media or other special application keyboard encoder.

■ WINDOWS is registered trademarks of Microsoft corporation.

Applications

■ USB Keyboard only.

■ USB and PS/2 both compatible with Keyboard